Spiderman, whose mass is 72.0 kg, is dangling on the free end of a 11.0-m-long 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 getting it to swing enough that he can reach a ledge when the rope makes a θ = 61.2° angle with the vertical. how much work was done by the gravitational force on spiderman in this maneuver?
