Question

A force of 100N acts on two blocks A and B of masses 2kg and 3 kg respectively, placed in contact on a smooth horizontal surface. what is the magnitude of force which block A exerts on block B​

Answer 1

Answer:

Suppose force F is applied on mass m1 (=2kg) which is in contact with the mass m2 (=3kg).If the normal reaction ‘R’applied by mass ‘m1′ on mass’ m2′ and vice versa. Then for mass ‘my we have

F—R=m1 a

R=m2 a

F=(m1+m2)a

a=F/(m1+m2)=100/(2+3)

=20m/s^2

Reaction between the two blocks, R=m2 a

=(3×20) N

=60 N

Explanation:

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