An undercoverpolice agent pulls a rubber squeegee down a very tallverticalwindow. The squeegeehas mass 160 g and is mounted on the end of alight rod. The coefficient of kinetic friction between the squeegeeand the dry glass is 0.900. The agent presses it against the windowwith a force having a horizontal component of 4.00 N. (a) If shepulls the squeegee down the window at constant velocity, whatvertical force component must she exert? (b) The agent increasesthe downward force component by 25.0%, but all other forces remainthe same. Find the acceleration of the squeegee in this situation.(c) The squeegee then moves into a wet portion of the window, whereits motion is now resisted by a fluid drag force proportional toits velocity according to     R = -(20.0 Ns/m)v. Find the terminal velocity that the squeegee approaches,assuming the agent exerts the same force described in part(b).


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