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Moment of Inertia of a Disc

A wheel of di...

Question

A wheel of diameter $2 m$ can be rotated about an axis passing through its centre by a moment of force equal to $2 \cdot 0 N m$ . What the minimum force must be applied on its rim ?

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Solution

$T = f \times r$
$\Rightarrow 2 N m = f \times 1 m$
$\Rightarrow f = 2 N$
Hence, the answer is $2 N .$

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