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Rotational Motion question

2025 · 8 Apr · Shift 2 · Q72

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JEE Main
Physics
Rotational Motion
2025 · 8 Apr · Shift 2 · Q72

Rotational Motion question

2025 · 8 Apr · Shift 2 · Q72

JEE MainPhysicsRotational MotionNumerical+4 / −1

A thin solid disk of 1 kg is rotating along its diameter axis at the speed of 1800 rpm . By applying an external torque of

25 \pi ~\mathrm{Nm}

for 40 s , the speed increases to 2100 rpm . The diameter of the disk is

\underline{\hspace{2cm}}

m.

Numerical answer

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