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In Fig a sphere of radius 2 m rolls on a...

In Fig a sphere of radius `2 m` rolls on a plank. The accelerations of the sphere and the plank are indicated. The value of `alpha` is

A

`4 rad//s^(2)`

B

`3 rad//s^(2)`

C

`2 rad//s^(2)`

D

`4 rad//s^(2)`

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The correct Answer is:
A
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