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When a mass is rotating in a plane about...

When a mass is rotating in a plane about a fixed point, its angular momentum is directed along.

A

the radius

B

the tangent to the orbit

C

a line perpendicular to the plane of rotation

D

the line making an angle of `45^@` to the plane of rotation.

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The correct Answer is:
C
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MOTION-ROTATIONAL MOTION -Exercise - 3 ( Section-A )
  1. Two persons of masses 55 kg and 65 kg respectively are at the opposite...

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  2. O is the centre of an equilateral triangle ABC. F(1), F(2) and F(3) ar...

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  3. When a mass is rotating in a plane about a fixed point, its angular mo...

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  4. The moment of inertia of a uniform circular disc is maximum about an a...

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  5. A circular platform is mounted on a frictionless vertical axle. Its ra...

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  6. Three masses are placed on the x-axis : 300 g at origin. 500 g at x = ...

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  7. A thin hollow sphere of mass m is completely filled with a liquid of m...

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  8. Assertion (A) Two circular discs of equal mass and thickness made of d...

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  9. A rod of weight w is supported by two parallel knife edges A and B an...

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  10. A mass m moves in a circles on a smooth horizontal plane with velocity...

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  11. Three idential spherical shells each of mass m and radius r are placed...

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  12. From a disc of radius R and mass m, a circular hole of diamter R, whos...

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  13. A uniform circular disc of radius 50 cm at rest is free to turn about ...

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  14. A disc and a solid sphere of same radius but different masses roll off...

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  15. A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm...

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  16. Two discs of same moment of inertia rotating their regular axis passin...

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  17. A solid sphere is in rolling motion. In rolling motion a body prossese...

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  18. A solid sphere is rotating freely about its symmetry axis in free spac...

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  19. There object, A : (a solid sphere), B : (a thin circular disk) and C :...

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  20. Which one of the following statements is incorrect ?

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