Question

Two blocks masses 2kg and 3kg is placed on plank. An external force of 10 is acting on 2kg block and the whole system is moving upward with constant accept. Of 2 m/ second square. What is normal between 3kg and plank ?

Answer 1

Answer:

Explanation:

60 newton

Answer 2

Explanation:

Two blocks are placed in contact on a smooth horizontal surface. Their masses are 2 kg and 3 kg. A 100 N force pushes on the 2 kg block. What is the magnitude of the force that the 2 kg block exerts on the 3 kg block?

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

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