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A particle performing uniform circular motion gas angular momentum `L`. If its angular frequency is double and its kinetic energy halved, then the new angular momentum is :

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SL ARORA-System of particles & rotational Motion-EXERCISE
  1. Radius of gyration of a body amount an axis of rotation is equal to th...

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  2. Two identical particles move towards each other with velocity 2v and v...

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  3. A particle performing uniform circular motion gas angular momentum L. ...

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  4. The moment of inertia of a disc about an axis through its centre and p...

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  5. A circular ring and circular disc of same radius have equal moments of...

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  6. A ballet-dancer stretches her hands out for slowing down. This is base...

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  7. A tangential force F is applied on a disc of radius R, due to which it...

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  8. A solid cylinder of mass M and radius R rolls down an inclined plane o...

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  9. The centre of mass of a body should necessarily lie within the body.

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  10. Statement-1 : The centre of mass of a system of n particles is the wei...

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  11. A boat is likely to capsize if the persons in the boat stand up

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  12. If no external torque acts on a body, will its angular velocity remain...

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  13. The centre of mass of a body changesits position with translatory as w...

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  14. A planet revolves around the sun under the effect of its gravitational...

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  15. Statement-1 : To unscrew a rusted nut, we need a wrench with longer ar...

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  16. Is angular momentum of a system always conserved ?

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  17. Two satellites of equal masses, which can be considered as particles a...

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  18. Statement-1: Two particles of mass 1 kg and 3 kg move towards each ot...

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  19. A thin uniform circular disc of mass M and radius R is rotating in a h...

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  20. When a solid sphere and a hollow sphere of same mass and size roll dow...

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