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A stationary wheel starts rotating about...

A stationary wheel starts rotating about its own axis at uniform rate amgular acceleration `8rad//s^(2)`.The time taken by its to complete `77` rotation is

A

`5.5 ` sec

B

7 sec

C

11 sec

D

14 sec

Text Solution

Verified by Experts

The correct Answer is:
C

`theta = 1/2 alphat^(2) rArr 2piN = 1/2 alphat^(2)`
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - I (C.W)
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  2. Two particle move in concentio cireles of radii r(1) and r(2) such tha...

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  3. A stationary wheel starts rotating about its own axis at uniform rate ...

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  4. A table fan , rotating at a speed of 2400 rpm is switched off and th...

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  5. If vec(F) = 2hat(i) - 3hat(j) N and vec(r ) = 3hat(i) + 2hat(j) m t...

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  6. A door 1.6 m wide requires a force of 1 N to be applied at the free an...

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  7. A weightless rod is acted on by upward parallel forces of 2 N and 4N e...

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  8. The mass of a uniform circular ring of radius 0.2m is 0.1kg. Calcuate ...

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  9. Two bodies of mass 1 kg and 2 kg are attached to the ends of a 2 me...

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  10. If the radius of gyration of a solid disc of mass 10 kg about an axis ...

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  11. A hoop of mass 500gm & radius 10cm is placed on a nail, then the momen...

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  12. The ratio of moments of inertia of two solid spheres of same mass but ...

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  13. The radius of a solid sphere is R and its density D. When it is made t...

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  14. Three particles of masses 1gm, 2gm & 3gm are at 1cm, 2cm & 3cm from th...

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  15. The radius of gyration of body is 18cm when it is rotating about an ax...

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  16. The position of axis of rotation of a body is changed so that its mome...

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  17. The diameter of a fly wheel is R. Its coefficient of linear expansion ...

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  18. Three point sized bodies each of mass M are fixed at three corners of ...

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  19. In above problem about an axis perpendicular to the palne of frame...

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  20. In above problem about an axis passing through any side of frame th...

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