A force of 20 N acts on a body and the body moves through 1m at an angle of 45º to the direction of force. The Work done by the force is :

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Question

$\frac{10}{\sqrt{2}} J$

$10 \sqrt{2} J$

$- 10 \sqrt{2} J$

$\frac{10}{\sqrt{2}} J$

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Given : F = 20 N, S = 1m
Work done
W = F(Scosθ)
$= 20 (1 \times \frac{1}{\sqrt{2}}) = 10 \sqrt{2} J$