Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 5 - Exercises and Problems: 54

Answer

Please see the work below.

Work Step by Step

We know that the centripetal acceleration is given as $a=\mu g$ We plug in the known values to obtain: $a=(0.71)(9.8)=6.958\frac{m}{s^2}$ The initial speed is given as $v_i^2=v_f^2+2ad$ We plug in the known values to obtain: $v_i^2=(\frac{25}{3.6})^2+2(6.958)(47)=701$ $v_i=26.5\frac{m}{s}$
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