Question

find the work done in pulling and pushing roller 200m horizontally when a force of 1500 newton is acting along a chain making an angle of 60 degree with ground floor to be smooth.​

Answer 1

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Answer 2

Given that,

Force acting on the roller, F = 200 m

Distance moved by roller is 200 m in horizontal direction.

It makes ab angle of 60 degree with ground floor to be smooth

To find,

Work done in pulling the roller.

Solution,

Work done by an object is given by the dot product of force and displacement such that,

$W=Fd\cos\theta\\\\W=1500\times 200\cos(60)\\\\W=150000\ J\\\\W=150\ kJ$

So, the work done by the roller is 150 kJ.

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Work done

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