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)=5 t^2-8 t, 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 { s} ? [23 Jan 2025 Shift 2]

JEE Main 23 Jan 2025 Shift 2 Paper

Section: Physics

Question : 26 of 75

Marks: +1, -0

A circular disk of radius R meter and mass M‌kg 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 ?

[23 Jan 2025 Shift 2]

72MR2
8MR2
108MR2
60MR2

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