1. Two blocks are connected by a massless string that runs over a massless and frictionless pulley. Block A of mass my is on a rough inclined plane that makes angle o with the horizontal and has a coefficient of kinetic friction u with the block. Block B of mass me is on a frictionless horizontal surface. The blocks are released from rest, and block A moves down the ramp. a) Derive an expression for the magnitude of the normal force on block A. b) Find an expression for the magnitude of the force of kinetic friction on block A. c) Set up Newton's 2"d Law for each block and derive an expression for wee weededwuwas a wild MA, me, 0 and g. 2. Two climbers are on a mountain. Simon, of mass m, is sitting on a snow covered slope that makes an angle 0 with the horizontal. The coefficient of static friction between his body and the snow is u. He is tied into one Simon end of a massless rope that runs over a frictionless pulley. Joe, of mass M, is at the other end of the rope. He has fallen and is hanging motionless below an overhang. De- 8 - - rive an expression for the maximum value of Joe's mass M so that Simon is not pulled down the slope. M Joe