Energy changes form -- from PE to KE and from KE to PE -- but the total amount of energy,
remains constant,
Because of energy conservation, a pendulum has the same maximum displacement on one side as on the other side. If you pull a heavy pendulum up to your chin and release it, it will swing out on the other side to the same height, and then return right back to your chin!
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(C) 2003, Doug Davis; all rights reserved
