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You want to lift a heavy box with a mass L = 72.0 kg using the two-ideal pulley system as shown. With what minimum force

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You want to lift a heavy box with a mass L = 72.0 kg using the two-ideal pulley system as shown. With what minimum force do you have to pull down on the rope in order to lift the box at a constant velocity? One pulley is attached to the ceiling and one to the box. L kg N

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