net force=mass*a
force on left-forceonright=mass*a
force on left -100*9.8=100*.940
A construction worker hoists himself up a building with the apparatus shown in the figure. A rope is attached to a chair and passes through a massless pulley that can turn without friction. The worker pulls on the free end to lift himself. Suppose that the combined mass of the chair and the man is 100 kg. With what force must the man pull down on the free end of the rope so that his upward acceleration is 0.940 m/s2?
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