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CBSE Class 11-science Answered

a child on the swing can increase his amplitude by pumping up. where does the xtra energy come from?
Asked by n jain | 21 Mar, 2011, 12:00: AM
answered-by-expert Expert Answer
Dear student,
 
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.
Thankyouo
Team
Topperlearning.com
Answered by | 21 Mar, 2011, 10:55: AM
CBSE 11-science - Physics
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