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add spring constant #12

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add spring constant #12

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2 changes: 1 addition & 1 deletion HW4/README.md
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Expand Up @@ -21,7 +21,7 @@ heading `# Homework #4` in your `README.md` file

PE_s=1/2\*K \*(DL)^2

where DL = 0.5 - sqrt(0.5^2+(0.5-x_C)^2)
where DL = 0.5 - sqrt(0.5^2+(0.5-x_C)^2) and K=30 N/m.

b. Use the `goldmin.m` function to solve for the minimum potential energy at xc when
theta=0. *create an anonymous function with `@(x) collar_potential_energy(x,theta)` in
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