University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 3 - Motion in Two or Three Dimensions - Problems - Exercises - Page 99: 3.82

Answer

frame rate, $f\geq23000 \space frames/s$, so option (c) is correct.

Work Step by Step

Let frame rate is $f$ frames/s, then time interval for one shot, $\Delta t=\frac{1}{f}\space s$. In that interval speed can travel maximum distance of $0.20 \space mm$. So, $v_{max}\Delta t=4.6\times\frac{1}{f}\leq0.20\times10^{-3}\Rightarrow f\geq\frac{4.6}{0.20\times10^{-3}}\Rightarrow f\geq23000 \space frames/s$.
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