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A ball hits a vertical wall horizontal a...

A ball hits a vertical wall horizontal at 10 m/s bounces back at 10 m/s

A

thereis no acceleration because `10(m)/(s)-10(m)/(s)=0`

B

There may be an acceleration because its initial direction is horizontal

C

There is an acceleration because there is a momentum change

D

Even though there is no change in momentum there is a change in direction. Hence it has an acceleration

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The correct Answer is:
C
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