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A ball of mass m strikes a rigid walJ wi...

A ball of mass m strikes a rigid walJ with speed u and rebounds with the same speed. The impulse imparted to the ball by the wall is

A

2mu

B

mu

C

zero

D

`-2"mu"`

Text Solution

Verified by Experts

The correct Answer is:
D
The situation is a shown in the figure

`p_("initial")="mu", p_("final")=-"mu"`
Impulse imparted to the ball=Change in momentum
`=p_("final")=p_("initial")=-"mu"-"mu"=-2"mu"`
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