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 {\Nm} for 40s, the speed increases to 2100 rpm . The diameter of the disk is \_\_\_\_ m. [8 Apr 2025 Shift 2]

JEE Main 8 Apr 2025 Shift 2 Paper

Section: Physics

Question : 50 of 75

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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 25π‌Nm for 40s, the speed increases to 2100 rpm . The diameter of the disk is ____ m.

[8 Apr 2025 Shift 2]

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