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update HW4

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rcc02007 committed Feb 21, 2017
1 parent 9d98bda commit f29d2cd48cf2333e32379a56402ef6b5a19f580e
Showing with 2 additions and 2 deletions.
  1. +2 −2 HW4/README.md
@@ -13,13 +13,13 @@ heading `# Homework #4` in your `README.md` file

The spring is unstretched when x_C=0.5 m. The potential energy due to gravity is:

PE_g=m x_C*g*sin(theta)
PE_g=m x_C\*g\*sin(theta)

where m=0.5 kg, and g is the acceleration due to gravity,

and the potential energy due to the spring is:

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

where DL = 0.5 - sqrt(0.5^2+(0.5-x_C)^2)

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