1.

A man sits on a chair supported by a rope passingover a frictionless fixed pulley. The man who weighs1000 N exerts a force of 450 N on the chairdownwards, while pulling the rope on the other side.If the chair weighs 250 N, then the acceleration of thechair is(1) 0.45 m/s(3) 2 m/s(2) zero(4) m/s25

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