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update HW4
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rcc02007 committed Feb 21, 2017
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2 changes: 1 addition & 1 deletion HW4/README.md
Expand Up @@ -9,7 +9,7 @@ heading `# Homework #4` in your `README.md` file
potential energy of a collar connected to a spring and sliding on a rod. As shown in potential energy of a collar connected to a spring and sliding on a rod. As shown in
the figure given a position, xc, and angle, theta: the figure given a position, xc, and angle, theta:


![Collar-mass on an inclined rod](collar_mass.svg) ![Collar-mass on an inclined rod](collar_mass.png)


The spring is unstretched when $x_{C}=0.5$. The potential energy due to gravity is: The spring is unstretched when $x_{C}=0.5$. The potential energy due to gravity is:


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