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A 25 kg child on a 2.0 m long swing is released from rest when the swing supports make an angle of 30.0 degrees with the vertica.

a. What is the maximum potential evergy associated with the child?
b. neglecting friction, find the child's speed at the lowest position.
c. What is the childs total mechanical energy?
d. If the speed of the child at the lowest position is 2.00 m/s, what is the change in mechanical energy due to friction?

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