Q.
Three objects, A: (a solid sphere), B: (a thin circular disk) and C: (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
see full answer
Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!
Real Strategies. Real People. Real Success Stories - Just 1 call away
An Intiative by Sri Chaitanya
a
WC>WB>WA
b
WA>WB>WC
c
WB>WA>WC
d
WA>WC>WB
answer is A.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
Work done required to bring a object to restΔW=ΔKEΔW=12Iω2; where I= moment of inertia For same ω,ΔW∝I For a solid sphere, IA=25MR2 For a thin circular disk, IB=12MR2 For a circular ring, IC=MR2∴ IC>IB>IA∴WC>WB>WA
Watch 3-min video & get full concept clarity