a child on the swing can increase his amplitude by pumping up. where does the xtra energy come from?
Asked by n jain | 21st Mar, 2011, 12:00: AM
There is nothing called xtra energy. There is always energy conversion taking place. The muscular energy of the kid ( in moving the legs with force) is converted to mechanical energy of the swing.
Hope this helps.
Answered by | 21st Mar, 2011, 10:55: AM
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