Answer
$F_v = 170~N$
Work Step by Step
The vertical forces on the fingers are equal and opposite to the climber's weight. We can find $F_v$:
$4~F_v = mg$
$F_v = \frac{mg}{4}$
$F_v = \frac{(70~kg)(9.8~m/s^2)}{4}$
$F_v = 170~N$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 12 - Equilibrium and Elasticity - Problems - Page 348: 36b
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