Answer
$56~\ lb$
Work Step by Step
The lever principle states that
$$F_1d_1=F_2d_2.$$
We plug in the given values to get:
$$
160\times 28=x\times 80\Longrightarrow x=\frac{ 160\times 28 }{80}=56~\ lb
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Cumulative Review - Page 446: 10
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