Question: A 25.0-kg child plays on a swing having support ropes that are 2.20 m long. Her brother pulls her back until the ropes are 42.0

A 25.0-kg child plays on a swing having support ropes that are 2.20 m long. Her brother pulls her back until the ropes are 42.0° from the vertical and releases her from rest.

(a) What is her potential energy just as she is released, compared with the potential energy at the bottom of the swing’s motion?

(b) How fast will she be moving at the bottom?

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