Verified Solution • 2025–26 Session
moderate
QNEET-2022-Ph-545: NEET 2022 Physics - Class 11 NEET-2022-Ph-545 Solution: An energy of 484 J is spent in increasing the speed of a…
An energy of 484 J is spent in increasing the speed of a flywheel from 60 rpm to 360 rpm. The moment of inertia of the flywheel is: 0.07 kg- 0.7 kg- 3.22 kg- 30.8 kg-
Multiple Choice Options
- A 0.07 kg-m 2
- B 0.7 kg-m 2
- C 3.22 kg-m 2
- D 30.8 kg-m 2
Step-by-Step Verified Solution
From work - energy theorem
W = _ k (change in Kinetic Energy)
In rotation, K E = 1 2 I _ 2
484 = 1 2 I ( _ f 2 _ _ i 2 )
_ 484 = 1 2 I [ ( 2 � 360 60 ) 2 _ ( 2 � _ 60 60 ) 2 ]
_ 484 = 1 2 I 4 � 2 ( 36 _ 1 )
_ I _ 0.7 kg-m 2