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An arrangement using pulley as shown is attached to a ceiling. A weight of 240 N is to be lifted. The weight of the pulleys is negligible If the actual force F is 180 N, the efficiency of the system is

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An arrangement using pulley as shown is attached to a ceiling. A weight of 240 N is to be lifted. The weight of the pulleys is negligible If the actual force F is 180 N, the efficiency of the system is






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