Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 10 - Rotational Kinematics and Energy - Problems and Conceptual Exercises - Page 326: 50

Answer

$\theta=35\ rad$

Work Step by Step

We know that $\omega_{\circ}=\frac{v_{\circ}}{t}$ We plug in the known values to obtain: $\omega_{\circ}=\frac{17}{0.33}=52\frac{rad}{s}$ Similarly, angular acceleration is given as $\alpha=\frac{a}{r}$ $\implies \alpha=\frac{1.12}{0.33}=3.4\frac{rad}{s^2}$ Now we can find the angular displacement as $\theta=\omega_{\circ}t+\frac{1}{2}\alpha t^2$ We plug in the known values to obtain: $\theta=(52)(0.65)+\frac{1}{2}(0.34)(0.65)^2$ $\theta=35\ rad$
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