1. The problem statement, all variables and given/known data Batman, whose mass is 101kg, is holding on to the free end of a 16 m rope, the other end of which is fixed to a tree limb above. He is able to get the rope in motion as only Batman knows how, eventually getting it to swing enough that he can reach a ledge when the rope makes a 80.4 degree angle with the vertical. The acceleration for gravity is 9.8m/s^2. How much work is done against the force of gravity in this maneuver? Answer in units of J. 2. Relevant equations W= Frcos(theta) 3. The attempt at a solution W= Frcos(theta) = (101*9.8)(16)(cos80.4) = 2641.08 J = wrong answer What am I doing wrong? From the looks of it, maybe the angle? If so what angle do I use and how do I find it?