Question

A rubber ball with a mass of 0.30 kg is dropped onto a steel plate. The ball's velocity just before impact is 4.5 m/s and just after impact is 4.2 m/s and just after impact is 4.2 m/s. What is the change in the ball's momentum?

Answer 1

Answer:

Change in momentum will be -2.61 kgm/sec

Explanation:

We have given mass of the rubber ball m = 0.30 kg

Velocity of the ball before the impact $v_1=4.5m/sec$

Velocity of ball after impact $v_2=-4.2m/sec$ ( negative sign is due to opposite direction of motion )

Change in momentum is given by $m(v_2-v_1)=0.3\times (-4.2-4.5)=0.3\times =0.3\times -8.7=-2.61kgm/sec$ ( negative sign shows the direction of change in momentum )