College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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At a family picnic you are appointed to push your obnoxious cousin
Throckmorton in a swing . His weight is w, the length of
the chains is R, and you push Throcky until the chains make an angle
u0 with the vertical. To do this, you exert a varying horizontal force F S
that starts at zero and gradually increases just enough that Throcky
and the swing move very slowly and remain very nearly in equilibrium
throughout the process. (a) What is the total work done on Throcky by
all forces? (b) What is the work done by the tension T in the chains? (c)
What is the work you do by exerting force F ? (Ignore the weight of the
chains and seat.)

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