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  4. A block of mass m is pulled along a circular arc by means of a constant horizontal force F as shown. Work done by this force in pulling the block from A to B is

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Q. A block of mass $m$ is pulled along a circular arc by means of a constant horizontal force $F$ as shown. Work done by this force in pulling the block from $A$ to $B$ isPhysics Question Image

Work, Energy and Power

Solution:

Work = Force $\times$ (Displacement in the direction of force)
$=F\left(R \sin 60^{\circ}\right)=\frac{\sqrt{3}}{2} F R$

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