Engineering Mechanics: Statics & Dynamics (14th Edition)

Published by Pearson
ISBN 10: 0133915425
ISBN 13: 978-0-13391-542-6

Chapter 18 - Planar Kinetics of a Rigid Body: Work and Energy - Section 18.5 - Conservation of Energy - Problems - Page 508: 64

Answer

$$ v_c=31.9 \mathrm{~m} / \mathrm{s} $$

Work Step by Step

$$ \begin{aligned} T_1+V_1 & =T_2+V_2 \\ 0+0 & =\frac{1}{2}\left[\frac{1}{12}\left(\frac{180}{32.2}\right)(8)^2\right] \omega^2+\frac{1}{2}\left(\frac{180}{32.2}\right)(1 \omega)^2-180(4) \\ \omega & =6.3776 \mathrm{rad} / \mathrm{s} \\ v_c & =\omega(5)=6.3776(5)=31.9 \mathrm{~m} / \mathrm{s} \end{aligned} $$
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