Answer
$$0$$
Work Step by Step
$$W=\int ^{4}_{1}f_{1}\left( x\right) dx+\int ^{1}_{4}f_{2}\left( x\right) dx=\int ^{4}_{1}3x^{2}dx+\int ^{1}_{4}3x^{2}dx=x^{3}]^{4}_{1}+x^{3}]^{1}_{4}=\left( 4^{3}-1^{3}\right) +\left( 1^{3}-4^{3}\right) =0$$
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 8 - Potential Energy and Conservation of Energy - Problems - Page 208: 76d
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