TEi=TEfKi+Ui=Klinear+Krotational+Ufinal
0+0=21m2v2+21m1v2+21Iω2−m1gh+m2gh
(m1+m2+R2I)R22(m1−m2)gh=ω
R1(m1+m2+R2I)2(m1−m2)gh
A uniformly thick wheel with moment of inertia I and radius R is free to rotate about its centre of mass (see fig). A massless string is wrapped over…
JEE Main 2020 — Physics Mechanics
2020mcqmedium
A uniformly thick wheel with moment of inertia I and radius R is free to rotate about its centre of mass (see fig). A massless string is wrapped over its rim and two blocks of masses m1 and m2(m1>m2) are attached to the ends of the string. The system Is released from rest. The angular speed of the wheel when m1 descends by a distance h is:
Official previous-year question
Held on 9 Jan 2020 · Verified 6 Jul 2026.
Options
- A
[(m1+m2)R2+I2(m1−m2)gh]21
- B
[(m1+m2)R2+I2(m1+m2)gh]21
- C
[(m1+m2)R2+1(m1−m2)]21gh
- D
[(m1+m2)R2+Im1+m2]21gh
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