Question

two blocks of masses m=1kg and M=2kg are in contact on a frictionless tabl3 .A horizontal force F=3N is applied to m ,fond the firce of contact between the blocks will the force of contact remain the same if F is applied forM​

Answer 1

Answer:

The value of force contact between two blocks is 1N. Option D is the right answer.

Explanation:

The blocks in contact with respective masses has an applied force horizontally over one mass so the contact force between them is calculated as following -

Given: Mass of one block m1 = 2 kg

Mass of other block m2 = 1 kg

Force applied F = 3 N

Therefore, the force applied on the mass will cause the motion in the block system, which is given by –

Force = mass x acceleration

Force on block system = mass of block system x acceleration of system

3 = ( 2 + 1 ) x a

a = 3 / 3

Now if the acceleration of the block system is 1 m / s 2 then the force exerted on mass m1 will be  

Force on mass m1 = m1 x acceleration of m2

Force on m1 = 2 x 1

Force on m1 = 2 N

Similarly, Force on m2 = m2 x acceleration

Force on m2 = 1 x 1

Force on m2 = 1 N

Therefore, the contact force between them = Force on m1 – Force on m2  

Contact force = 2 – 1

Contact Force = 1 N  

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