A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the disk such that θ(t) = 5t² - 8t, where θ(t) is the angular position of the rotating disc as a function of time t. How much power is delivered by the applied torque, when t = 2 s?

Rotational Motion: JEE Main 2025 Physics question

JEE Main 2025 · 23 Jan, Evening shift · Q35

JEE Main 202523 Jan, Evening shiftPhysicsMediumRotational Motion140× since 2002

A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the disk such that

\theta(t) = 5t^2 - 8t

, where

\theta(t)

is the angular position of the rotating disc as a function of time t. How much power is delivered by the applied torque, when

t = 2

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JEE Main 2025 Rotational Motion Question with Solution (23 Jan Evening shift, Q35) | JEE Arc