Published by:
CGP EDU Academic Team
Published on: August 14, 2026
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 
for 40 s , the speed increases to 2100 rpm . The diameter of the disk is___m
Text Solution
Verified by ExpertsThe correct answer is:
40
(40)
Given, 
Using equation of motion
Also, 
Hence, diameter of disk 
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