Question 2 A 25 kg window cleaner uses a 10 kg ladder that is 5m long. He places one end on the ground 3 m from the wall, rests the upper end against cracked window, and climbs the ladder. He climbs 3.5 m up the ladder when the window breaks. Neglect the friction between the ladder and window and assume the base of the ladder does no slip. When the window is on the verge of breaking, (a) what is the magnitude of force by the window on the ladder, (b) the magnitude of force on the ladder from the ground (c) what is the frictional force on the ladder by the ground