Simple Pendulum Centripetal Acceleration

robwashere

1. The problem statement, all variables and given/known data
http://screensnapr.com/v/tC6gC3.jpg

2. Relevant equations
Im guessing: Centripetal Acceleration = v^2/r
PE = mgh
KE = .5mv^2

3. The attempt at a solution
I tried to convert the givens into velocity by using .5mv^2, but that does not work.

Doc Al

Hint: Apply Newton's 2nd law.

robwashere

Quote by Doc Al

Hint: Apply Newton's 2nd law.

You sir, are a genius! Thanks!

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robwashere	Simple Pendulum Centripetal Acceleration Tweet 1. The problem statement, all variables and given/known data http://screensnapr.com/v/tC6gC3.jpg 2. Relevant equations Im guessing: Centripetal Acceleration = v^2/r PE = mgh KE = .5mv^2 3. The attempt at a solution I tried to convert the givens into velocity by using .5mv^2, but that does not work.

Doc Al Mentor Blog Entries: 1	Hint: Apply Newton's 2nd law.