posted by Kali .
Consider the figure below. (Let w1 = 150 N and w2 = 38.0 N.)
(a) What is the minimum force of friction required to hold the system of the figure in equilibrium?
(b) What coefficient of static friction between the 150-N block and the table ensures equilibrium?
(c) If the coefficient of kinetic friction between the 150-N block and the table is 0.127, what hanging weight should replace the 38.0-N weight to allow the system to move at a constant speed once it is set in motion?