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July 10, 2014

July 10, 2014

Posted by **tris** on Sunday, December 26, 2010 at 9:44pm.

- science -
**Damon**, Sunday, December 26, 2010 at 10:36pmlet I = m L^2

theta = A sin wt

torque = -m g L sin theta = approx -m g L theta

dTheta/dt = A w cos w t

d^2Theta/dt^2 = -Aw^2 sin wt = - w^2 Theta

I d^2Theta/dt ^2 = m g L theta

m L^2 w^2 = m g L

w^2 = g/L

(YOU MIGHT START HERE IF FORMULA IN YOUR BOOK)

2 pi f = sqrt(g/L)

f = 72/180

2 pi (72/180) = sqrt (g/1.5)

6.317 = g/1.5

g = 9.47 m/s^2

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