#### Answer

$F=500N$

#### Work Step by Step

As torque about pivot is zero
$\implies mg\times x-F\times 22=0$
This can be rearranged as:
$F=\frac{mgx}{22}$
We plug in the known values to obtain:
$F=\frac{55\times 9.8\times 20.4}{22}$
$F=500N$

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Published by
Pearson

ISBN 10:
0321993721

ISBN 13:
978-0-32199-372-4

$F=500N$

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