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16. We use Eq. 818, representing the conservation of mechanical energy. The reference
position for computing
U
is the lowest point of the swing; it is also regarded as the
“final” position in our calculations.
(a) In the solution to problem 7, we found
U
=
mgL
(1 – cos
θ
) at the position shown in
Fig. 834 (which we consider to be the initial position). Thus, we have
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Energy

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