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A man of mass m,
75.0 kg holds on to a rope that passes through three pulleys and is attached
to the ceiling at point A as shown in the figure. One of the pulleys is connected to a box of mass
m, = 280 kg that slides on a frictionless plane inclined at an angle 0 = 45.0"with respect to the
horizontal. The pulleys are massless and frictionless and the system is subject to the regular force
of gravity.

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