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Structure of Skeletal Muscle

A ball strike...

Question

A ball strikes the floor vertically downward with a speed $5 m/s$ and rebounds with the same speed. The magnitude of its change in velocity will be

A

Zero

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B

5 m/s

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C

10 m/s

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D

40 m/s

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Solution

The correct option is C $10 m/s$
$v_{i} = 5 m/s$
$v_{f} = 5 m/s$
Change in the magnitude of
Velocity $= v_{f} - v_{i}$
$= 5 - (- 5) = 10 m/s$

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