How much work was done by the gravitational force

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Batman whose mass is 80 kg is dangling on the free end of a 12 m rope, the other end of which is fixed to a tree limb above. By repeatedly bending at the waist, he is able to get the rope in motion, eventually making it swing enough that he can reach a ledge when the rope makes a 60? angle with the vertical. How much work was done by the gravitational force on Batman in this maneuver.

Reference no: EM13531425

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