# Question #5a7d9

##### 1 Answer

Nov 10, 2017

The kinetic energy of a body can be reduced by allowing a force to do work on the body. To reduce the kinetic energy, the force must be opposite to the direction of velocity vector. There are two possibilities here:

[1] **Applied force is a conservative force**: If the force employed to do the work is a **conservative force** (Ex: Gravitational Force), then the **kinetic energy** reduced is stored in the system itself as a **potential energy** which can be recovered anytime again.

[2] **Applied force is a dissipative force**: If the force employed to do the work is a **non-conservative force** (Ex: Friction), then the **kinetic energy** reduced is actually dissipated away as heat. It is lost permanently and cannot be recovered.