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: 61

Answer

Please see the work below.

Work Step by Step

We know that we have to balance the forces along the radial direction $N+mgcos(\phi)=\frac{mv^2}{r}$ When the contact is lost then the normal force becomes zero, that is $N=0$ $mgcos(\phi)=\frac{mv^2}{r}$ $cos{\phi}=\frac{v^2}{rg}$
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