A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?

A body falls freely under gravity from rest. Name the kind of energy it will possess

(a) At the point from where it falls.

(b) While falling

(c) On reaching the ground.

What do you understand by the conservation of mechanical energy? State the condition under which the mechanical energy is conserved.

Name two examples in which the mechanical energy of a system remains constant.