kg child plays on a swing having support ropes that are 2.10 m long. A friend pulls her back until the ropes are 41.0 ∘ from the vertical and releases her from rest. Part A What is the potential energy for the child just as she is released, compared with the potential energy at the bottom of the swing? Express your answer in joules. U = nothing J Request Answer Part B How fast will she be moving at the bottom of the swing? Express your answer in meters per second. v = nothing m/s Request Answer Part C How much work does the tension in the ropes do as the child swings from the initial position to the bottom? Express your answer in joules. W = nothing J Request Answer Provide Feedback