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If the torque acting on a system is zero...

If the torque acting on a system is zero then, which of the followin quantities is conserced ?

A

Angular momentum

B

Kinetic energy

C

Linear momentum

D

Angular kinetic energy

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AAKASH INSTITUTE ENGLISH-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-Assignment (Section - A) Objective Type Questions (One option is correct)
  1. A constant torque of 400Nm turns a wheel of moment of inertia 100kg m^...

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  2. The masses of two uniform discs are in the ratio 2 : 1 and their radii...

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  3. If the torque acting on a system is zero then, which of the followin q...

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  4. The moment of inertia of a thin uniform rod about an axis passing thro...

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  5. A rigid body of moment of inertia l has an angular acceleration alpha....

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  6. A flywheel rotates about a fixed axis and slows down from 300 r.p.m to...

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  7. A body starting from rest gains an angular speed of 540 r.p.m in 6 sec...

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  8. A ring of mass 6kg and radius 40cm is revolving at the rate of 300 rpm...

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  9. A ring of mass 10kg and diameter 0.4m is rotated about an axis passing...

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  10. If radius of the earth contracts to half of its present value without ...

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  11. A wheel whose moment of inertia is 10kgm^(2) has an initial angular ve...

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  12. Two solid spheres are made up of the same material of density rho. The...

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  13. A fan of moment of inertia 0.6kgm^(2) is moving with a speed of 0.5 r....

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  14. A hollow cylinder open at both ends slides without rotating, and then ...

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  15. A solid sphere of mas 2kg rolls on a table with linear speed of 1 m//s...

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  16. The moment of inertia of a uniform cicrular disc about its diameter is...

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  17. A flywheel rotating about a fixed axis has a kinetic energy of 360J wh...

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  18. We have two spheres, one of which is hollow and the other solid. They ...

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  19. The moment of inertia of a body about a given axis is 1.2 kg m^(2). In...

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  20. A solid cylinder of mass 20 kg rotates about its axis with angular vel...

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