A ball of mass 0.15kg is kicked against a rigid vertical wall with a horizontal velocity of 50ms-1. If it rebounced with a horizontal velocity of 30ms-1, Calculate the impulse of the ball on the ball · ·
A
3.0Ns
B
4.5Ns
C
7.5Ns
D
12.0Ns
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Impulse = m(v-u)
= 0.15(50--30)
= 0.15 X 80
= 12N/s
Source: Myschool Past Questions Archive (Record #27589)