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Physics, 08.04.2020 04:18 maukjackie1974
A child with a weight of 140 N swings on a playground swing attached to 2.10 m long chains. What is the gravitational potential energy (in J) of the child-earth system relative to the child's lowest position at the following times?
a. when the ropes are horizontal
b. when the ropes make a 25.0° angle with the vertical
c. when the child is at the bottom of the circular arc
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A child with a weight of 140 N swings on a playground swing attached to 2.10 m long chains. What is...
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