A 74.6-kg window cleaner uses a 10.3-kg ladder that is 5.12 m long. He places one end 2.45 m from a wall and rests the upper endagainsta crackedwindowandclimbsthe ladder.He climbs 3.10 m up the ladder when the window breaks. Neglecting friction between the ladder and the window and assuming that the base of the ladder does not slip, find (a) the force exerted on the windowby the ladder justbeforethe window breaks and (b) the magnitude and direction of the force exerted on the ladder by the ground just before the window breaks.

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