Homework Help: Physics

Posted by Robert on Tuesday, February 5, 2008 at 8:54pm.

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

Physics - Damon, Tuesday, February 5, 2008 at 9:01pm
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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