A block of mass M = 109.0 kg on an inclined plane is attached to another block of mass m via a string, as in the figure below. The coefficients of static and kinetic friction for the block and the incline are u, = 0.40 and uy = 0.20 and the plane is inclined 16.9° with horizontal.

A block of mass, m = 20 kg, rests on the inclined plane shown. What is the minimum force, P, required to maintain equilibrium of the block? The static coefficient of friction is 0.2 and the kinetic coeficcient of friction is 0.15 M 25° P 80⁰ Solve the problem and answer the questions that follow.

2.0 kg push 45° Problem 4: (a) The 2 kg wood box in the Figure above on the left slides up a vertical wood wall while you push on it at a 45° angle. The coefficient of kinetic friction for wood on wood is Hk = 0.2. What magnitude force Fpush should you apply to cause the box to slide up at a constant speed? Recall that constant speed means a = 0 m/sec?. Answer: 34.6 N. (b) Let's re-do part (a), but with the box now sliding down the vertical wood wall while you push on it at a 45° angle. Hk is still Hk = 0.2. What magnitude force Fpush should you apply to cause the box to slide down at a constant speed? Recall that constant speed means a = 0 m/sec?. Answer: 23.1 N. Problem 5: The Figure shows two blocks connected by a cord (of negligible mass) that passes over a frictionless pulley (also of negligible mass). The arrangement is known as Atwood's machine. One block has mass mi = 1.3 kg; the other has mass m2 = 2.8 kg. What are: (a) The magnitude of the blocks' acceleration. Answer: 3.6…

Dont forget to draw the FREE BODY DIAGRAMS ALSO PLEASE! (: