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A 39.5 N child is in a swing that is attached to ropes 2.01

What is the gravitational potential energy when the ropes make a 32.1° angle with the vertical?

  • physics -

    How high has the child been raised?

    I get 2.01(1-cos32.1)
    then, mgh.

  • physics -

    why would you subtract cos32.1 from 1?

    and how would u find the gravitational potential energy when the child is at the bottom of the circular arc? would u just multiply the force (39.5N) by the height (2.01m)?

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