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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`

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The correct Answer is:
D
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - II
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