Question

what will be the answer . with method
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Answer 1

The answer is 0 Newtons

Block B together with block A is lying on rough surface with coefficient of friction=0.5.

So, it will be able to accelerate if force applied is greater than (coefficient of friction)*(mA+mB)*g=0.5*10*10=50 N.

But force applied is only 25 N which is less than 50 N.

So there will be no acceleration and frictional force between A and B wont arise.

So frictional force is greater than acceleration

Hence it cannot move and acceleration is 0

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