Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 2 - Motion Along a Straight Line - Problems - Page 33: 17a


$28.5$ cm/s

Work Step by Step

Average velocity : $v_{avg}=\displaystyle \frac{\Delta x}{\Delta t}=\frac{x_{2}-x_{1}}{t_{2}-t_{1}}$ Instantaneous velocity: $v(t)=\displaystyle \frac{d}{dt}x(t)$ --------------------------------------- $v_{avg}=\displaystyle \frac{\Delta x}{\Delta t}=\frac{x_{2}-x_{1}}{t_{2}-t_{1}}=\frac{50.25cm-21.75 cm}{3.00s-2.00s}$ $=28.5$ cm/s
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