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Quark Itself
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Homework Statement
A pendulum, consisting of a metal sphere and a massless string of length L, is initially held horizontal from a fixed support at point P. The pendulum is released from rest and it swings. It then hits a peg at point O and the distance between P and O is assumed to be Y. From there the sphere swings upwards in an arc, so what is the sphere's speed at point D?
Homework Equations
W = fdcos(theta)
KEi + PEi = KEf + PEf (i = initial and f = final)
The Attempt at a Solution
I figured that the PE is zero from point A since it's at rest and then I got stuck as the second part of the problem rose, when the sphere swings upwards.
I had a link to a picture, but it refuses to upload, but I'll try to upload it for later.