Question

Find the force applied by block A on block B. (All the

surfaces are smooth)

(A) 10 N (B) 5 N

(C) 7 N (D) 15 N

Answer 1

Let force of A on B be N

For A,

F=ma

10-N=3*1(because acceleration of whole system is 1 from f=ma)

N=7

For B,

F=ma

N-5=2*1because acceleration of whole system is 1 from f=ma)

N=7

Answer 2

The amount of force exerted on body by due to body a is 7 N