Answer
$2.4s$
Work Step by Step
We know that
$\frac{T}{4}=\frac{\pi}{2}\sqrt{\frac{L}{g}}$
We plug in the known values to obtain:
$\frac{T}{4}=\frac{\pi}{2}\sqrt{\frac{75ft}{9.81\frac{m}{s^2}}(\frac{0.305m}{ft})}$
$\frac{T}{4}=2.4s$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 13 - Oscillations About Equilibrium - Problems and Conceptual Exercises - Page 448: 61
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