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A heavy ring fo mass m is clamped on the...

A heavy ring fo mass m is clamped on the periphery of a light circular disc.A small particle having equal mass is clamped at the centre of the disc. The system is rotated in such a way that the centre of mass moves in a circle of radius r with a uniform speed v. We conclude that an external force :

A

`(mv^2)/r` must be acting on the central particle

B

`(2mv^2)/r` must be acting on the central particle

C

`(2mv^2)/r` must be acting on the system

D

`(2mv^2)/r` must be acting on the ring

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The correct Answer is:
C
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HC VERMA-CENTRE OF MASS, LINEAR MOMENTUM, COLLISION-Objective -1
  1. Consider the following two equations (A). vecR=1/M sumimivecri and...

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  2. Consider the following two statements: A. linear momentum of the syst...

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  3. Consider the following two statements. (A) Linear momentum of a syst...

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  4. Consider the following two statements: A The linear momentum of a pa...

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  5. All the particles of a body are situated at a distance of X from origi...

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  6. A circular plate of diameter d is kept in contact with a square plate ...

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  7. Consider a system of two identical particles. One is at rest and the o...

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  8. Internal forces can change

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  9. A bullet hits a lock kept at rest on a smooth horizontal surface and g...

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  10. A uniform sphere is place on a smooth horizontal surface and as horizo...

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  11. A body falling vertically downwards under gravity breaks in two parts ...

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  12. A ball kept in a close box moves in the box making collisions with the...

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  13. A body at rest breaks into two pieces of equal masses. The parts will ...

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  14. A heavy ring fo mass m is clamped on the periphery of a light circular...

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  15. The quantities remaining constant in colision are

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  16. A shell is fired from a cannon with a velocity V at an angle theta wit...

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  17. In an elastic collision

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  18. In an inelastic collision

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