Short/Long Answer Questions
1. Define the term energy.
2. State the SI unit of energy and define it.
3. What is potential energy? State its unit.
4. State the expression for gravitational potential energy.
5. State two factors on which the potential energy of a body at a certain height above the ground depends.
6. Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
7. State two factors on which the kinetic energy of a moving body depends.
8. Give the formula of kinetic energy.
9. A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain the same?
10. State the energy changes that occur in the following:
(i) The unwinding of a watch spring.
(ii) Burning coal while operating a steam engine.
(iii) The lighting of a torch bulb.
(iv) An electric generator (or dynamo).
Plz, answer these correctly and in sequence. I will mark the first answer—if fully correct—as the Brainliest.
Answers
Answer:
energy - Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another
2 - As energy is defined via work, the SI unit of energy is the same as the unit of work – the joule (J), named in honor of James Prescott Joule and his experiments on the mechanical equivalent of heat. In slightly more fundamental terms, 1 joule is equal to 1 newton metre and, in terms of SI base units.
3 - the energy possessed by a body due to its state of rest or position is called potential energy. it's S.I unit is joule
4 - Gravitational potential energy is the energy an object has due to its position above Earth, energy due to its height. ... The equation for gravitational potential energy is GPE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 on Earth), and h is the height above the ground in meters.
Explanation:
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