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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.

Angular acceleration of sphere is

A

`(2F)/(9mR)`

B

`(5F)/(9mR)`

C

`(3F)/(mR)`

D

`(9F)/(mR)`

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