Answer:
Energy: It is the capacity of work done by the body,
- for example, kinetic energy, potential energy, thermal energy, and so on. The S.I. unit of energy is Joule.
Mechanical Energy: Mechanical energy is the energy of the body corresponding to its motion or change in its position.
- For example, potential energy and kinetic energy.
Law of conservation of energy: According to the law of conservation of energy, the net energy of the system remains conserved.
- For example, in the case of elastic collision, the net energy of the system is conserved before and after the collision.
Law of conservation of energy for moving object: The net energy of the moving object remains conserved.
- For example, the net energy of the ball sliding down the hill without any loss of energy remain conserved.
