#### Answer

$8 \mathrm{~J}.$

#### Work Step by Step

The work is given by the integral of force through the distance:
$$
\int_{-0.05}^{-0.15} 800 x d x=\left.400 x^{2}\right|_{-0.05}^{-0.15}=8 \mathrm{~J}.
$$

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Published by
W. H. Freeman

ISBN 10:
1464125260

ISBN 13:
978-1-46412-526-3

$8 \mathrm{~J}.$

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