Pendulum question

  • Thread starter fridsatu
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  • #1
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I am sure this is simple to most people...but i dont understand how to show potential energy of a pendulum to be mgcostheta/2l. is there anybody that could break that down for me??
 

Answers and Replies

  • #2
Chi Meson
Science Advisor
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First of all, it's not.

PE of a pendulum is mg [L-Lcos(theta/2)].

What's the usual formula for PE? What of the above formula is equal to the "h"?
 

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