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bfr
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Homework Statement
The bob of a pendulum 1.2m long is pulled aside so the string is 40 degrees from the vertical. When the bob is released, with what speed will it pass through the bottom of its path?
Homework Equations
PE=mgh
KE=(mv^2)/2
The Attempt at a Solution
Well, I started out with cos 40=x/1.2 and found x to be approximately .92, but I don't exactly know where to go from there.