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A wheel of radius $R$ with an axle of radius $R / 2$ is shown in the figure and is free to rotate about a frictionless axis through its centre and perpendicular to the page. Three forces $(F, F, 2 F)$ are exerted tangentially to the repective rims as shown in the figure.
The magnitude of the net torque acting on the system is nearly
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The magnitude of the net torque acting on the system is nearly
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The correct answer is:
$3.5 \mathrm{FR}$
$\tau_{\text {Net }}=F\left(\frac{R}{2}\right)+F R+2 F R=3.5 \mathrm{FR}$
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