find the size of the contact force between the two blocks.

Question

Two blocks are in contact on a frictionless table. A horizontal force F is applied to M₂, as shown. If M₁ = 1.45 kg, M₂ = 3.38 kg, and F = 5.40 N, find the size of the contact force between the two blocks.

Answer 1

The two blocks are in contact so the acceleration of both = F/(m1+m2). The force required to accelerate m1 is therefore = F*m1/(m1+m2) = 5.4/4.83= 1.12 m/s^2