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Block A of mass m rests on the plank B o...

Block A of mass m rests on the plank B of mass 3m which is free to slide on a frictionless horizo-ntal surface. The coefficient of friction between the block and plank is 0.2. If a horizontal force of magnitude 2 mg is applied to the plank B, the acceleration of A relative to the plank and relative to the ground respectively, are:

A

`0,g/2`

B

`0,(2g)/3`

C

`(3g)/5, g/5`

D

`(2g)/5, g/5`

Text Solution

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The correct Answer is:
D
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