A particle of mass m is rigidly attached at A to a ring of mass 3 m and radius r .The system is released from rest and rolls without sliding .The angular acceleration of ring just after release is?
Answers
Answered by
2
Explanation:
Moment of intertial of the system is
I=3mr2+mr2=4mr2
using τ=I∝=4mr2 ...(1)
Torque by force around O is
τ=mgr ...(ii)
comparing (i) and (ii)
∝4mr2=mgr
∝=4rg
Answered by
2
Explanation:
Moment of intertial of the system is
I=3mr
2
+mr
2
=4mr
2
using τ=I∝=4mr
2
...(1)
Torque by force around O is
τ=mgr ...(ii)
comparing (i) and (ii)
∝4mr
2
=mgr
∝=
4r
g
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