During that lift, what is the work done on the canister by the weight mg of the

Question

During that lift, what is the work done on the canister by the weight mg of the canister? (Hint: When a cord loops around a pulley as shown, it pulls on the pulley with a net force that is twice the tension in the cord.)

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In the figure, a cord runs around two massless, frictionless pulleys; a canister with mass m = 35 kg hangs from one pulley; and you exert a force F on the free end of the cord. You must pull the free end of the cord 12 cm to lift the canister by 6 cm. During that lift, what is the work done on the canister by the weight mg of the canister? (Hint: When a cord loops around a pulley as shown, it pulls on the pulley with a net force that is twice the tension in the cord.) Will rate ASAP.

Explanation / Answer

There is no acceleration, so the lifting force is equal to the weight of the object. We note that the person

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