Question

The velocity of a body of mass 10kg increases from 4m/s to 8m/s when a force acts on it for 2s.What is the momentum before the force acts.

Answer 1

ANS:40 kg.m/s

Explanation:

Mass of the body (m)= 10 kg

Initial velocity (u)= 4 m/s

Final velocity (v)= 8 m/s

Time (t)= 2 s

Momentum before force acts = m x u

= 10 x 4

= 40 kg.m/s