Question
Physics Question on momentum
A batsman hits back a ball of mass 0.4 kg straight in the direction of the bowler without changing its initial speed of 15 ms-1. The impulse imparted to the ball is _________ Ns.
Answer
The correct answer is 12
Given : m = 0.4 kg , v = 15 ms-1
Impulse = change in momentum
= m[v – (–v)]
= 2 mv
= 2 × 0.4 × 15
= 12 Ns