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{excerpt:hidden=true}Compares the simple pendulum model with a slightly more detailed one.{excerpt}

|!179px-Grandfather_clock_pendulum.png!|
|Photo Courtesy of Wikimedia Commons|
|Downloaded 2009-01-16 from Charles H. Henderson & John F. Woodhull (1901) The Elements of Physics, D. Appleton & Co., New York, p.59, fig.21|


Adding detail to the model of the [pendulum].


{HTMLcomment}The "Solution" header and the *bold* items below should NOT be changed.  Only the regular text within the {cloak} macros should be altered.{HTMLcomment}

h4. Solution 

{toggle-cloak:id=sys} *System:* {cloak:id=sys}A model of a [pendulum], simply supported and free to swing without friction about a supporting axis under the ][torque] due to [gravity|gravity (near-earth)].{cloak:sys}

{toggle-cloak:id=int} *Interactions:* {cloak:id=int}Specify the relevant interactions here.{cloak:int}

{toggle-cloak:id=mod} *Model:* {cloak:id=mod}[Angular Momentum and External Torque about a Single Axis]{cloak:mod}

{toggle-cloak:id=app} *Approach:*

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{toggle-cloak:id=diag} {color:red} *Diagrammatic Representation* {color}

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Include a diagrammatic representation whenever possible.

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{toggle-cloak:id=math} {color:red} *Mathematical Representation* {color}

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The regular solution.  

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