SOLUTION: Please help me with this confusing question. The period T (time in seconds for one complete cycle) of a simple pendulum is related to the length L (in feet) of the pendulum by the

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Question 306347: Please help me with this confusing question. The period T (time in seconds for one complete cycle) of a simple pendulum is related to the length L (in feet) of the pendulum by the formula 8T^2 = (pi)^2L. If a child is on a swing with a 10-foot chain, then how long does it take to complete one cycle of the swing?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
given:
L+=+10 ft
8T%5E2+=+pi%5E2+%2AL
8T%5E2+=+pi%5E2+%2A10
T%5E2+=+%285%2F4%29%2Api%5E2
T+=+sqrt%28%285%2F4%29%2Api%5E2%29
T+=+%28pi%2F2%29%2Asqrt%285%29
T+=+1.5705%2A2.236
T+=+3.512
One cycle takes 3.512 sec