Simple Machines

Simple Machines problem 4

Peter wants to move a 10 kg bag of cement to the second floor of a building. He decides to lift the bag with the help of two pulleys to a window that is 10 m high. The rope is routed through a movable pulley and a fixed pulley as shown in the figure. With what force will Peter pull the rope? How much work does Peter do when lifting?

pulleys for lifting cement bags


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