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A solid sphere of mass m and radius R is...

A solid sphere of mass `m` and radius `R` is placed over a plank of same mass `m`. There is sufficient friction between sphere and plank to prevent slipping.

Acceleration of centre of mass of sphere is

A

`(2F)/(9m)`

B

`(7F)/(9m)`

C

`(9F)/(6m)`

D

`(5F)/(9m)`

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