Answer
$122.5$ ft-lb
Work Step by Step
$W=\dfrac{1}{2}mv^2$
Here, we have $m=1.6 oz=\dfrac{0.1~lb}{32~ft/s^2} =\dfrac{1}{320}~slugs$
and $v=280~ft/s$
Plug in the values:
$W=(\dfrac{1}{2})(\dfrac{1}{320})(280)^2=122.5$ ft-lb
University Calculus: Early Transcendentals (3rd Edition)
by Hass, Joel R.; Weir, Maurice D.; Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0321999584
ISBN 13:
978-0-32199-958-0
Chapter 6 - Section 6.5 - Work - Exercises - Page 381: 26
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