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posted by  pttest on 7/21/2009 8:33:28 PM  |  status: Live  |  Earned Karma: 10

Nonconservative energy

Course Textbook Chapter Problem Needs by
General Physics Physics (3rd) by Walker N/A N/A N/A
Question Details:
Catching a wave, a 77 kg surfer starts with a speed of 1.0m/s , drops through a height of 1.75m , and ends with a speed of 8.4m/s. How much nonconservative work was done on the surfer?
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Oracle
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(University of North Florida)
posted by VSL on 7/21/2009 8:42:26 PM  |  status: Live
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Response Details:
Note: apply work-energy principles

Solution:
"In physics, you don't have to go around making trouble for yourself - nature does it for you" - Frank Wilczek
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posted by MasterChef on 7/21/2009 8:43:55 PM  |  status: Live
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Response Details:
The initial energy is:


The final energy is:



So we have an additional amount of work done by a nonconservative force which is equal to:
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