# icse class 7 physics energy

Class 7 - ICSE Board - Physics - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. A bigger unit is kilo-calorie (symbol kcal) where 1 kcal = 1000 cal. Example : In a swinging pendulum moving to and fro, the bob has the kinetic energy. = mgh Thus, a body may possess energy even though it is not in motion. The falling stone has the kinetic energy. Sound 7. Kinetic energy will be zero but the body will have. P.E. from electrical energy to mechanical energy. Correct — A gum bottle lying on a table has energy. Which of the two has greater potential energy ? (v) Chemical energy to light energy. ... Selina Concise ICSE Solutions for Class 7 Physics Chapter 3 Energy. Can a body possess energy even when it is not in motion ? (iii) Electrical energy to light energy. Correct — There is always some loss of energy in conversion from one form of energy to the other form, so the total energy is conserved. Light Energy 5. (vii) Electrical energy and (f) The energy possessed by a body due to its motion is called kinetic energy. Electricity and Magnetism Chemistry: 1. Give one relevant example for each of the following transformation of energy : The water stored in the dam has the potential energy. (iii) Potential energy. kinetic energy changes into potential energy, potential energy changes into kinetic energy. (a) A man going up has potential energy and kinetic energy both. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. (a) An electric fan converts electrical energy into mechanical energy. Heat 6. False. Answer: During the vertical fall of ball, if friction due to air is neglected, the total sum of potential energy and kinetic energy at each point of its path remains same. A cyclist doubles his speed. (v) Sound energy Answer: True. (v) Fire crackers burst. Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored. (iv) An electric generator (or dynamo). Potential energy of a body is due to its motion, Kinetic energy of a body is due to its position or state. Answer. Heat energy changes into mechanical energy. Selina Publishers Concise Physics for Class 7 ICSE Solutions all questions are solved and explained by expert teachers as per ICSE board guidelines. For both the bodies gravity and height are same so the body with greater mass possesses greater potential energy. Energy is the capacity of doing work. (iii) A compressed spring. Write true or false for each statement. The flowing water of river is collected in a dam at a high altitude. K.E. Explain your answer with an example. 1800-102-5301 Login Or Join Extramarks Question 5. Answer. Answer: Answer: ICSE class 7 Physics Define reflected ray? Question 17. 1. So that you can get the best result while studying it. (iv) Electrical energy change into mechanical energy. (vii) Potential energy. Learn and practice for class VII ICSE pattern. (b) The speed of the body — More the speed of the body, higher is its kinetic energy. Answer: The different forms of energy are : (i) Mechanical energy (ii) Heat energy (iii) Light energy (iv) Chemical energy (v) Sound energy (vi) Magnetic energy (vii) Electrical energy and (viii) Atomic energy or nuclear energy. (iii) Chemical energy into light and heat energy. Visit official Website CISCE for detail information about ICSE Board Class-7. (i) A moving cricket ball. False. Give two examples to show the conversion of energy from one form to another. This kinetic energy does work on the nail as the stone strikes the nail arid makes the nail to move into the wood. from electrical energy to mechanical energy. For a better understanding of this chapter, you should also see summary of … It is defined as follows : Kinetic energy of a body is the energy possessed by it due to its state of motion. (iv) Chemical energy to heat energy. We know that heat is a modified unit or form of energy. Here, both the cars are moving with same speed. (vi) Water flowing in a river. Which of the two has the greater potential energy ? You can download the Selina Concise Physics ICSE Solutions for Class 7 with Free PDF download option. For a better understanding of this chapter, you should also see summary of Chapter 4 Light Energy Physics Class 7. Meritnation provides Studymaterial for ICSE Class 7 PHYSICS. (d) The ability to do work is called energy (b) Its height above the ground : Higher the height of the body, greater is its potential. State its unit. Yes, these are the best Selina 12 Physics solution options on the market. (vi) Potential energy. The work done by a force on a body is equal to the product of the force and the distance moved by the body in the direction of force, i.e. This can be explained as follows : Actually, it is the work spent in bringing the body to that state of rest or position. Physical Quantities and Measurement 2. An electric eel is a fish that makes its own electricity, Lightning is spark of electricity in the air and bulb uses electricity to glow. The falling stone has the kinetic energy. Select a Chapter from the menu to view the specific chapter. Answer: (v) Fire crackers burst. Define the term energy. True. Answer: The energy of a body in motion is called its kinetic energy. (2) In an electric motor (or in fan), the electrical energy changes into the mechanical energy. Define temperature? (iv) Electrical energy change into mechanical energy. Yes, a body possesses energy even when it is not in motion ; The energy of a body in a state is equal to the work done on the body to bring it to that state. Write true or false for each statement. (iii) Light energy Answer: During the vertical fall of ball, if friction due to air is neglected, the total sum of potential energy and kinetic energy at each point of its path remains same. unit of potential energy is Joules. Actually, it is the work spent in bringing the body to that state of rest or position. The energy possessed by the flowing water is called the hydro energy. State the unit of energy and define it. Studymaterial for the Energy, ICSE Class 7 PHYSICS, Concise Physics 7. This is very useful for high school students studying Physics, more precisely for class 10 students of ICSE, CBSE, international boards like IGCSE, state boards, etc.) Name the form of energy which a wound up watch spring possess. Correct — There is always some loss of energy in conversion from one form of energy to the other form, so the total energy is conserved. This energy rotates the axle of motor (or the blades of the fan). Kinetic energy of a body is the energy possessed by it due to its state of motion. (c) at the ground. (g) Green plants convert light energy into chemical energy. ... ICSE Class 7 Sample Papers and Solutions. State the changes in form of energy while producing hydro electricity. Watch General Effects Of Heat Energy explained in the form of a story in high quality animated videos. K.E. A wound up watch spring has the potential energy because of its wound up state. E.g: 9876543210, 01112345678. State the changes in form of energy while producing hydro electricity. (b) Its height above the ground : Higher the height of the body, greater is its potential. ICSE Grade 6; Physics; Simple Machines Light . Name five different forms of energy. Answer: The examples that show the conversion of energy from one form to another are : It is discussed that heat changes the temperature of the system, it leads to chemical, biological and physicsl changes of the system. (vii) A stretched rubber band. Then heat jenergy of steam changes into the mechanical energy which makes the train to move. A bucket full of water .is on the first floor of your house and another identical bucket with same quantity of water is kept on the second floor. Answer. Our Selina solutions for Concise Physics Class 7 ICSE cover everything from Physical Quantities and Measurement, Motion, Energy, Light Energy, Heat, Sound, Electricity and Magnetism and the other topics. (c) In an electric fan, electrical energy changes into the mechanical energy. ICSE Class 7 Tests. Kinetic energy can change into potential energy, but potential energy cannot change into kinetic energy. Academic Partner. Then heat jenergy of steam changes into the mechanical energy which makes the train to move. State any three uses of plane mirrors? Examples are : motion of roller coaster, free vertical fall of a body etc. (a) An electric fan converts electrical energy into mechanical energy. This means “The total mechanical energy (P.E + K.E) of an isolated system at any instant is equal to the sum of kinetic energy and the potential energy.” = 1 / 2 Mv2 In the 6th chapter of ICSE Physics Class 9, Heat and Energy is to be covered in the class as per the board guidelines. ICSE SolutionsSelina ICSE SolutionsML Aggarwal Solutions. Students who are preparing for their Class 7 exams must go through Selina Concise Physics middle school Class 7 Textbook Solutions for Chapter 4 Light Energy. = 1 / 2 Mv2 When v = doubles the K.E. Explain your answer with an example. Can a body possess energy even when it is not in motion ? Answer: This means “The total MECHANICAL ENERGY (P.E + K.E) of an isolated system at any instant is equal to the sum of kinetic ENERGY and the potential ENERGY.” Condition : Condition under which the mechanical energy is conserved is “WHEN THERE ARE NO FRICTIONAL FORCES.” In other words the mechanical energy is conserved strictly in vacuum where friction due to air is absent. False. Kinetic energy of a body is the energy possessed by it due to its motion. P.E. (b) A gum bottle lying on a table has no energy. State the kind/ kinds of energy possessed by the ball when it is In the figure below when the stone is dropped from that position, it begins to fall. ICSE Class 7 Revision Notes. (i) Potential energy to kinetic energy. As the turbine rotates, it rotates the armature of the generator (or dynamo) to produce electricity. Potential energy of a body is the energy possessed by it due to its state of rest or position. (ii) Electrical energy to mechanical energy. Solutions for ICSE Class 7 Physics chapter Energy are designed by Next Gurukul. Kinetic energy can change into potential energy, but potential energy cannot change into kinetic energy. State the energy changes that occur in the following : (i) The unwinding of a watch spring. Similarly, in the figure below the potential energy possessed by the stone at a height changes into its kinetic energy when it falls, The kinetic energy of the falling stone does work in raising the weight upwards. This kinetic energy does work in moving the arms of the watch. True. (iii) Potential energy. We will give you a call shortly, Thank You. = mgh . By studying these Selina ICSE Solutions for Class 7 Physics you can easily get good marks in ICSE Class 7 Board Examinations. Select Class Class 6 Class 7 Class 8 Class 9 Class 10. Our learning system helps your children learn at their own pace. Motion State of rest, motion and types of motion Uniform & Non uniform motion, Speed & Numericals Composite motion, mass & weight … (iii) Tube eight of bulbs. The different forms of energy are : Mass of both bucket and the gravitational force are same, so the body at greater height will possess more potential energy. How will his kinetic energy change: increase, decrease or remain same ? True. The electricity obtained from the energy possessed by the flowing water is called the hydro-electricity. (ii) Potential energy. Question 2. (ii) Burning coal while operating a steam engine. A body is said to possess an energy of one joule if a force of 1 newton moves the body by a distance of 1 metre in the direction of force. i] Find the kinetic energy of a ball of mass 500 g moving at a speed of 20 cm/s. Access lesson wise solutions and learn easily. If no motion takes place, no work is said to be done. Selina solutions for Concise Physics Class 7 ICSE chapter 3 (Energy) include all questions with solution and detail explanation. So the car with greater mass will possess greater kinetic energy. This kinetic energy does work in moving the arms of the watch. Selina Concise Physics Class 7 ICSE Solutions Chapter 4 Light Energy includes all the important topics with detailed explanation that aims to help students to understand the concepts better. Question 22. (i) Electrical energy to heat energy. (iv) Kinetic energy. Answer: (i) Potential energy to kinetic energy. (i) Kinetic energy. Answer. Question 3. Selina Publishers Concise Physics Class 7 ICSE Solutions are now solved and explained by the best teachers. Selina Publishers Concise Physics for Class 7 ICSE Solutions all questions are solved and explained by expert teachers as per ICSE board guidelines. Free PDF download of Class 10 Physics Chapter 2 - Work, Energy and Power Revision Notes & Short Key-notes prepared by our expert Physics teachers as per CISCE guidelines. The water stored in the dam has the potential energy. This can be explained as : K.E. This can be explained as : Give two examples to show the conversion of energy from one form to another. Points to remember, Short answers,Long answer and MCQ's for easy learning. APlusTopper.com provides step by step solutions for Selina Concise ICSE Solutions for Class 7 Physics. What is potential energy ? Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. In short form it is written as K.E. MCQs. Correct — One form of energy can be converted into the other form. State two factors on which the kinetic energy of a moving body depends. (b) A ball rolling on the ground possesses, (c) The energy stored in an electric cell is, (d) When a bulb lights up on passing current, the change of energy is, (f) According to law of conservation of energy, energy changes from one form to another form, but the total energy of that system. (e) The energy possessed by a body due to its position is called potential energy. Answer: True. Solve the Selina questions and compare it with ICSE Selina Class 8 Physics Chapter 4- Energy Solutions to find out how correct you are with your answers. Thus, a body may possess energy even though it is not in motion. The flowing water of river is collected in a dam at a high altitude. Give one example of a body that has potential energy, in each of the following : (i) due to its position, (ii) due to its state. Define Magnetic energy? It is defined as follows : Answer: (i) Kinetic energy. Answer. Selina Concise Physics Class 7 ICSE Solutions has been put together by vastly experienced teachers keeping in mind the latest ICSE syllabus and requirement of the examinations. Two bodies A and B of masses 10 kg and 20 kg respectively are at the same height above the ground. (f) The energy possessed by a body due to its motion is called kinetic energy. (d) Potential energy changes into kinetic energy when it is put to use. (c) Energy possessed by a compressed spring is potential energy. (v) A bullet fired from a gun. As the spring unwinds itself, the potential energy changes into the kinetic energy. Define volume? (ii) A stone at rest on the top of a building. Question 24. the total energy remains conserved. Matter and Its Composition 2. False. ICSE VII Physics Heat General Effects Of Heat Energy The most important use of hydro energy is to produce electricity from it. For both the bodies gravity and height are same so the body with greater mass possesses greater potential energy. Energy can exist in several forms and may change from one form to another. (a) at the highest point How will his kinetic energy change: increase, decrease or remain same ? quadriples, Question 14. (iv) Burning of wood, coal etc. Work and Energy – Work. Define speed? It is difficult to imagine our life without electricity. Selina Concise Physics Class 7 ICSE Solutions Chapter 3 Energy includes all the important topics with detailed explanation that aims to help students to understand the concepts better. (a) Potential energy. Visit official Website CISCE for … Answer: (iv) Burning of wood, coal etc. Answer: Yes, a body possesses energy even when it is not in motion ; Consider a body raised to a certain height say h. It its velocity is zero. To register Physics Tuitions on Vedantu.com to clear your doubts. (h) The S.I.unit of energy is joule or own an. It is written as P.E. (ii) Potential energy of a body in the raised (or lifted) position depends on two factors : (1) the mass of the body greater the mass of the body, greater is the potential energy of the body), and (2) the height of the body above the ground (greater the height of the body, greater is its potential energy.). Give one example to show the conversion of potential energy to kinetic energy when put in use. ... ICSE 9 Physics > Heat and Energy . Question 20. Potential energy of a body is due to its motion, Kinetic energy of a body is due to its position or state. Physics / Work and Energy. (ii) Potential energy. = 1 / 2 Mv2 Here, both the cars are moving with same speed. Answer: K.E. Answer: Therefore the S.I. Energy ICSE Class-7th Concise Selina Physics Solutions Chapter-3. Energy 4. (iv) Kinetic energy. Answer: The example to show the conversion of potential energy to kinetic energy when put in use is : A stone at a height has the potential energy due to its lifted or raised position. (e) One form of energy cannot be converted into another form. Answer: A wound up watch spring has the potential energy because of its wound up state. Visit official Website  CISCE  for detail information about ICSE Board Class-7. ICSE Sample papers free PDF for class 7 Physics has been provided by Vedantu here. If not for Physics, the world would never be functioning the way we see it today. His kinetic energy increases four times. This energy rotates the axle of motor (or the blades of the fan). State two factors on which the potential energy of a body at a certain height above the ground depends. Answer: The water in motion in a river or sea has the kinetic energy. Selina Concise Physics Class 7 ICSE Solutions Chapter 4 Light Energy includes all the important topics with detailed explanation that aims to help students to understand the concepts better. Another unit of energy is calorie (symbol cal) where 1 cal = 4.2 J. P.E. Answer: The potential energy of a body in the raised position depends upon the following two factors : (a) The mass of the body: Greater the mass of the body, greater is the potential energy of the body. (g) The energy of flowing water can be converted into electric energy (electricity). Answer. The kinetic energy of a moving body depends on the following two factors : Answer. (a) The mass of the body: Greater the mass of the body, greater is the potential energy of the body. (2) In an electric motor (or in fan), the electrical energy changes into the mechanical energy. ... My children are unable to cope with the pace of topics being taught in class. Question 13. (iv) Chemical energy to heat energy. The energy is measured in the same unit as work. Answer: ... Energy is the capability of doing work. The potential energy of a body in the raised position depends upon the following two factors : In transformation of energy, the total sum of useful and non-useful energy obtained after conversion is equal to the energy converted, i.e. Answer: The energy of a body at rest is called the potential energy. The energy of a body at rest is called the potential energy. (b) Cooking gas converts chemical energy into heat energy. It is defined as follows : = mgh (b) A gum bottle lying on a table has no energy. Question 7. (vi) Potential energy. According to the conservation of mechanical energy, if friction is neglected, the total sum of potential energy and kinetic energy remains constant. Question 23. (a) A man going up has potential energy and kinetic energy both. Actually, it is the work done on the body bringing it to the state of motion. (b) Potential energy + Kinetic energy. The amount of work done depends on two factors : (i) on the magnitude of the force applied (greater the force applied, greater is the work done), and (ii) on the distance moved in the direction of force (greater the distance moved, greater is the work done). or K. Toll Free No. Video Lesson. (v) A bullet fired from a gun. State the unit of energy and define it. Kinetic energy will be zero but the body will have. Motion 3. (b) just in the middle (ii) An electric generator. (i) An object falling freely from the roof of a multistorey building has potential energy and kinetic energy when halfway down the building. It is the energy stored when work is done to bring the body in motion. The energy of a body in motion is called its kinetic energy. Actually, it is the work done on the body bringing it to the state of motion. True. Answer: unit of energy is joule (symbol J). Question 16. Question 6. Thus, the potential energy stored in the stone in its raised position changes into the kinetic energy when the stone is falling. Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. (b) The speed of the body — More the speed of the body, higher is its kinetic energy. Question 4. A ball is made to fall freely from a height. Answer. unit of energy is joule (symbol J). Work is said to be done if the applied force on the body moves it. (c) Kinetic energy. Question 15. Answer: The mechanical energy is found in two forms namely : (a) The potential energy, and (b) The kinetic energy. When a cyclist doubles his speed. Answer. Therefore the S.I. Define the term energy. Question 8. (v) Kinetic energy. State the condition when does it hold. 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A cyclist doubles his speed. If no motion takes place, no work is said to be done. (ii) Heat energy Answer: (i) Potential energy of a body is the energy possessed by it due to its state of rest or position. This will clear students doubts about any question and improve application skills while preparing for board exams. State the condition when does it hold. Give one example of a body which possesses kinetic energy. It is defined as follows : Potential energy of a body is the energy possessed by it due to its state of rest or position. State the energy changes that occur in the following : (iv) A moving bus. Correct — One form of energy can be converted into the other form. (e) One form of energy cannot be converted into another form. What is potential energy ? Answer: The body B having mass 20 kg has the greater potential energy. = mgh Answer: Numerical Problems on Work, Energy, Power. (d) Potential energy changes into kinetic energy when it is put to use. Which of the two has the greater potential energy ? (iii) A compressed spring. quadriples, Name the form of energy which a wound up watch spring possess. In short form it is written as K.E. What was the important event in science, which took place in 1665? = mgh . Question 18. (vii) Potential energy. Question 11. (viii) Atomic energy or nuclear energy. (b) Cooking gas converts chemical energy into heat energy. (iii) Tube eight of bulbs. Work Energy Power – Notes. Selina Concise Physics Class 7 ICSE Solutions – Energy. Clear students doubts about any question and improve application skills while preparing for Board exams in transformation of is! Bigger unit is kilo-calorie ( symbol kcal ) where 1 kcal = 1000 cal in line heat and energy deals... Kept on second floor has the greater potential energy of a body is due to its motion is the. Takes place, no work is done to bring the body, is... One form to another from that position, it leads to chemical, biological and physicsl changes the. Of motor ( or dynamo ) cal ) where 1 cal = 4.2 J Board.! Practice Test and more for CBSE Class 10 at TopperLearning dynamo ), but potential energy capacity ( or ). Energy will be zero but the body, Higher is its potential easily get good marks ICSE... Difficult questions this kinetic energy g moving at a certain height above the ground measured in the stone falling... Login or Join Extramarks watch General Effects of heat energy the following transformation energy! With free PDF download option which possesses kinetic energy of a body etc Solutions., coal etc ] Find the kinetic energy changes into the wood motor ( dynamo. Energy remains constant if friction is ignored ball is made to fall freely from a height no. Doubts about any question and improve application skills while preparing for Board exams CISCE for … Solutions Class. Know that heat changes the temperature of the fan ), the potential stored... Above the ground: Higher the height of the body with greater mass possesses greater potential energy possessed... And height are same, so the body moves it never be functioning the way we see today! These are the best Selina 12 Physics solution options on the top of a body may possess energy when! Water is called the hydro energy to and fro, the world would be... J ) useful and non-useful energy obtained after conversion is equal to the work =. Kinetic or potential ) possessed by the best teachers Lessons, Practice Test and more for CBSE Class 10 TopperLearning. Better understanding of icse class 7 physics energy Chapter, you should also see summary of 4. Place in 1665 bring the body at greater height will possess greater kinetic energy changes into the wood energy. Selina ICSE Solutions for Class 7 Physics Chapter 6 – heat and energy cal... Of river is collected in a swinging pendulum moving to and fro, potential. Chapter, you can get the best teachers mgh Thus, the bob has the greater energy!, but potential energy changes into the other form, Biology and more... Be converted into the wood of potential energy to heat energy of building! Also see summary of Chapter 4 light energy ICSE Class-7th Concise Selina Physics Solutions Chapter-4 termed the! Compressed spring is potential energy changes into the mechanical energy which a wound up watch spring the. Of river is collected in a swinging pendulum moving to and fro, the electrical energy changes into heat.. Body to bring the body at rest is called its kinetic energy can exist in several forms may! Taught in Class all questions are solved and explained by expert teachers per. Shortly, Thank you the axle of motor ( or the blades of the steam how his. These are the best Selina 12 Physics solution options on the icse class 7 physics energy moves it example to show the of. Login or Join Extramarks watch General Effects of heat energy = force × distance in! Has potential energy to kinetic energy both Measurement of Volume Determination of Area... To the topic of energy can be converted into the kinetic energy can change... Or dynamo ) to do work same height above the ground: Higher height! Transformation of energy: ( i ) electrical energy changes into heat energy unable to cope with the same above. – work energy Power – Notes be functioning the way we see it today these... Or sea has the potential energy energy and kinetic energy of a body in a dam a. 1800-102-5301 Login or Join Extramarks watch General Effects of heat energy of a body at is! Of wood, coal etc while preparing for Board exams no motion takes place, no work done! The cars are moving with same speed are solved and explained by expert teachers as per Board... ; Physics ; Simple Machines light and clear your doubts all questions solved. ( f ) icse class 7 physics energy unwinding of a body is due to its state of motion, Short Answers, Lessons! Which makes the nail arid makes the train to move sum of useful and non-useful obtained. A Chapter from the menu to view the specific Chapter path in current... Its position or state work spent in bringing the body — more the speed of the generator ( or ). The changes in form of energy can be converted into electric energy ( kinetic or potential possessed. Forms and may change from one form of energy while producing hydro electricity the cars are with. ] Find the kinetic energy of a hydroelectric Power plant moves it is measured in the transformation. 1 / 2 Mv2 Here, both the bodies gravity and height are same the... The ICSE Class 7 Physics questions and Answers helps students while solving difficult.! ’ has the kinetic energy symbol J ) summary of Chapter 4 energy! In its raised position changes into the mechanical energy, deal with everything related to the work spent in the... If friction is neglected, the world would never be functioning the way we see it.... Potential ) possessed by it due to its state of rest or position work in... Physics ICSE SolutionsChemistryBiologyMathsGeographyHistory & Civics, Selina Concise ICSE Solutions for ICSE Class 7 Class Class. Of coal changes to heat energy... My children are unable to cope with same! Changes into the other form free vertical fall of a body is energy. Can get the best teachers subjects: Physics, Concise Physics Class 7 body possess energy even when it difficult... Motion takes place, no work is said to be done if the applied force on body! Or sea has the greater potential energy important use of hydro energy is produce! Produced by charges 4 light energy Physics Class 7 Physics Chapter energy are designed by Gurukul... Physics Chapter Notes, questions & Answers, Long answer and MCQ 's for easy.! Burning of wood, coal etc kcal ) where 1 kcal = 1000 cal car with mass! Application skills while preparing for Board exams marks in your exams 7 Class 8 Class Class... It leads to chemical, biological and physicsl changes of the body to state. Heat is a modified unit or form of energy while producing hydro.! The top of a ball is made to fall freely from a height of... Water can be converted into another form of useful and non-useful energy obtained after conversion equal... Force or W = f × d, the electrical energy changes occur! The Selina Concise ICSE Solutions all questions are solved and explained by flowing! At greater height will possess more potential energy the form of energy is measured in figure. To do work improve application skills while preparing for Board exams fall freely from a gun which the potential,... And fro, the bob has the kinetic energy of a body may possess energy even it... ( symbol J ) may possess energy even when it is not motion... Heat is a modified unit or form of energy can not be converted another! Possesses greater potential energy learn at their own pace the Selina Concise Solutions. Same, so the car with greater mass will possess greater kinetic energy of the body to bring it that! Masses 10 kg and 20 kg respectively are at the same unit as work:... Into heat energy application skills while preparing for Board exams ( kinetic or potential ) possessed by the flowing is! Blades of the steam it is discussed that heat changes the temperature of body! To register Physics Tuitions on Vedantu.com to clear your confusions, if any energy is (... The conversion of energy can be converted into electric energy ( kinetic or ). 4.2 J body — more the speed of 20 cm/s relevant example for of. Into the mechanical energy is collected in a state is equal to the work spent in the. Energy both not be converted into another form gravitational force are same, so the with! Having mass 20 kg respectively are moving with same speed has no energy 4.2 J changes the. ) an electric fan, electrical energy changes into the mechanical energy for ICSE Class 7 Physics Chapter energy... Move into the wood most important use of hydro energy which possesses kinetic energy when it is the done. Or form of energy is the energy possessed by it due to its position or.. Or position the same height above the ground explained in the following: ( i the!, Video Lessons, Practice Test and more for CBSE Class 10 about ICSE Board guidelines shows... Unit of energy can not be converted into electric energy ( electricity ) a height... That position, it is defined as follows: kinetic energy both the cars moving! To clear your confusions, if any body etc for Selina Concise ICSE Solutions for Class 7 Physics Chapter,. Changes that occur in icse class 7 physics energy dam has the kinetic energy when put in use of..