Physics

A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions:

a) When the ropes are horizontal
b) When the ropes make a 30.0 degree angle with the vertical
c) at the bottom of the circular arc

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  1. m g h = 40 * 9.8 * h
    how high above bottom of swing is h
    a) h = 2 meters
    b) h = 2 (1 - cos 30)
    c) 0

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