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twenty5
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Homework Statement
I have a pendulum sitting at 15 degrees from the vertical, it does 1 revolution every 2 seconds. the chain is 1.0m long. The tension is 2.0N
My question is which Method would be correct? My professor said, that Method I is the same a Method II (the ones I wrote on the solution) except, the resulting mass does not equal each other. He also told us, use what you can do get the answer quick or something... this was the reply when I asked that the second method incorporates centripetal force,velocity, and the radius... while the first one does not?
thank you so much guys, I really need an answer before I present this to him :S I have an exam tomorrow unfortunately.
Homework Equations
Fy = 0 ; -Fg + Ftcos15 = 0
Fx = Ftsin15 = (mv^2)/2
The Attempt at a Solution
provided..
[PLAIN]http://img560.imageshack.us/img560/9695/questionm.jpg
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