Question

Problem 16. Two blocks (M1 = 5 kg and M2 = 10 kg) are pushed along a frictionless horizontal surface. There is friction between the two blocks described by µk

= 0.4 and µs = 0.5. Find the minimum force F min needed for M1 to remain suspended in the air as the blocks accelerate to the right.

Fig: 1

Fig: 2