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A 76 kg window cleaner uses a 12 kg ladder that is 5.1 m long. He places one end on the ground 2.0 m from a wall, rests the upper end against a cracked window, and climbs the ladder. He is 3.3 m up along the ladder when the window breaks. Neglect friction between the ladder and window and assume that the base of the ladder does not slip.
(a) When the window is on the verge of breaking, what is the magnitude of the force on the window from the ladder?
___ N
(b) When the window is on the verge of breaking, what is the magnitude of the force on the ladder from the ground?
(c) What is the angle of this force on the ladder?
___ ° (above the horizontal)
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q1. an airtight box has a removable lid of area 1.00 10-2 m2 and negligible weight. the box is taken up a mountain
a construction crew wants to extend a uniform rigid metal bar of length 7m and mass 400kg between two platforms which lie on the same horizonantally level. What force does the beam exert on the edge of the platform
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