Center of MassMedium
Question
A ring of mass m and a particle of same mass fixed on a disc of same mass such that centre of mass of the system lies at centre of the disc. The system rotate such that centre of mass of the disc move in a circle of radius R with a constant angular velocity w. From this we conclude that
Options
A.An external force mω2R must be applied to central particle
B.An external force mω2R must be applied to the ring
C.An external force 3mω2R must be applied to central particle
D.An external force 3mω2R must be applied any where on the system
Solution
An external force of 3mω2R is required which can act anywhere on system.
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