JAMB - Physics (1998 - No. 6)
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 · ·
3.0Ns
4.5Ns
7.5Ns
12.0Ns
설명
Impulse = m(v-u)
= 0.15(50--30)
= 0.15 X 80
= 12N/s