Physics Technology Update (4th Edition)

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

Chapter 5 - Newton's Laws of Motion - Problems and Conceptual Exercises - Page 146: 81

Answer

(D) $4.21\times 10^4$ N

Work Step by Step

We know that $a=\frac{v^2-v_{\circ}^2}{2s}$ We plug in the known values to obtain: $a=\frac{(0m/s)^2-(36m/s)^2}{2(1m)}$ $a=-648m/s^2$ Now $F=(65Kg)(-648m/s^2)$ $F=-4.21\times 10^4N$ Thus, the magnitude of force on the driver is $4.21\times 10^4N$ and hence the correct option is $D$.
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