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A constant torque acting on a uniform ci...

A constant torque acting on a uniform circular wheel changes its angular momentum from L to 4 L in 4 seconds.The magnitude of torque is :

A

`3L/4`

B

L

C

`4L/3`

D

`L/4`.

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JBD PUBLICATION-MOTION OF SYSTEM OF PARTICLES AND RIGID BODY-EXAMPLE
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  2. A body is rotating, it is necessary being acted upon by an exteral tor...

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  5. Where does centre of mass of a triangular lamina lie?

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  6. Is the angular momentum a scalar quantity ?State its unit.

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  7. What is the direction of angular momentum of a body?

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  8. Is centre of mass a reality?

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  10. A shell fired from a gun explodes into pieces in air .How is the centr...

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  11. A ballet-dancer stretches her hands out for slowing down.What principl...

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  12. Under what conditions angular momentum of a moving body is zero?

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  18. What is rotational analogue of mass?

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  19. Is radius of gyration of a body a constant quantity?

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