SOLUTION: Find the length of a pendulum that makes one swing in three seconds?

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Question 81126This question is from textbook
: Find the length of a pendulum that makes one swing in three seconds? This question is from textbook

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the formula for a simple pendulum is T=2%2Api%2Asqrt%28L%2Fg%29 ... where T=period, L=length, g=gravitational acceleration

solving for L gives L=gT%5E2%2F4pi%5E2 ... so L=32%2A9%2F4pi%5E2 ... L equals approximately 7.30 feet