Answer
$F_x=12t$
Work Step by Step
We know that the force is given by
$$ F_x=\dfrac{dp_x}{dt}$$
Plugging the given momentum formula;
$$ F_x=\dfrac{d (6t^2)}{dt} $$
Therefore,
$$ \boxed{F_x =12t}$$
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0321740904
ISBN 13:
978-0-32174-090-8
Chapter 9 - Impulse and Momentum - Exercises and Problems - Page 241: 32
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