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A horizontal force of 25N pulls a box along a table.How much work does it do in pulling the box 80cm?

$\begin{array}{1 1}20J\\10J\\25J\\40J\end{array} $

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Answer : 20J
Work is force times displacement through which the force acts.
Here,force is in the same direction as the displacement,so
$W=(25N)(0.08m)=20J$
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