Question

Give a definition for the following:

1) Energy
2) Mechanical Energy
3) Law of Conservation of Energy
4) the law of conservation of energy for moving objects​

Answer 1

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.