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Law of Conservation of Energy

A sphere of m...

Question

A sphere of mass $m$ is moving with a velocity $(4^i -^j) m / s$ hits a surface and rebounds with a velocity $(^i + 3^j) m / s$ . The coefficient of restitution between the sphere and the surface is $k / 16$ . find the value of $k$

A

9

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B

8

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C

7

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D

6

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Solution

The correct option is A 9

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