A crane of mass M = 14700 kg lifts a wrecking ball of mass m = 1270 kg directly upward.
a) Find the magnitude of the normal force exerted on the crane by the ground while the wrecking ball is moving upward at a constant speed of v = 1.49 m/s.
b) Find the magnitude of the normal force if the wrecking ball's upward motion slows at a constant rate from its initial speed v = 1.49 m/s to a stop over a distance D = 0.225 m.