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A ball rebounds off a smooth wall with the same speed v but reversed horizontal component. If its mass is m and incidence is normal, what impulse does the wall impart?

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Question

A ball rebounds off a smooth wall with the same speed v but reversed horizontal component. If its mass is m and incidence is normal, what impulse does the wall impart?

Options

  • 0

  • mv

  • 2mv

  • mv/2

MCQ
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Solution

2mv

Explanation:

Magnitude of impulse is 2mv2mv along the outward normal.

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