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A spherical rigid ball is realeased from...

A spherical rigid ball is realeased from rest and starts rolling down an inclined plane from height h=7m, as shown in the figure. It hits a block at rest on the horizontal plane (assme elastic collision). If the mass of both the ball and the block is m and the ball is rolling without sliding, then the speed of the block after collision is close to

A

6m/s

B

8m/s

C

10 m/s

D

12 m/s

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