Discussion Forum



1)

On a smooth plane surface (figure) two block A and B are accelerated up by applying a force 15 N on A. If mass of B is twice that of A, the force on B is

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A) 30 N

B) 15 N

C) 10 N

D) 5 N

Answer:

Option C

Explanation:

The acceleration of both the blocks = $\frac{15}{3x}=\frac{5}{x}$

.'. Force on B = $\frac{5}{x}\times2x$ = 10N