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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.When a horizontal force `F` is applied at centre of sphere, acceleration of the plank is

A

`(F)/(2m)`

B

`(3F)/(4m)`

C

`(F)/(4m)`

D

`(3F)/(2m)`

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