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When 200 J of work is done on a fly whee...

When `200 J` of work is done on a fly wheel its frequency of rotation increase from `4Hz` to `9 Hz`. The `M.I.` of the wheel about the axis of rotations is nearly

A

`0.12 " kg "m^(2)`

B

`0.2 " kg m"^(2)`

C

`0.22 " kg m"^(2)`

D

`0.3 " kg m"^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`W = 1/2 I 4pi^(2) (n_(2)^(2) - n_(1)^(2))`
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - II (H.W)
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  5. A uniform metal rod of length L and mass M is rotating about an axis p...

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  6. A ball of mass 1 kg is projected with a velocity of 20sqrt(2) m/s ...

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  7. A uniform sphere of mass m , radius r and moment of inertia I ab...

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  8. When 200 J of work is done on a fly wheel its frequency of rotation in...

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  9. A fly wheel of M.I. 6xx10^(-2) kgm^(2) is rotating with an angular vel...

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  10. If the kinetic energy of a rotating body about an axis is decreased by...

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  11. The moment of inertia of a wheel of radius 20 cm is 40 kgm^(2) if a ta...

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  12. An initial momentum is imparted to a homogenous cylinder, as a results...

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  13. A solid cylinder starts rolling down on an inclined plane from its top...

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  14. A thin metal rod of length 0.5 m is vertically straight on horizontal ...

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  15. A wheel of radius 0.2 m rolls without slip ping with a speed 10m/s...

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  16. Show that a cylinder will slip on an inclined plane if the coefficient...

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  17. A thin metal disc of radius 0.25m and mass 2kg starts from rest and ro...

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  18. A ball rolls without slipping. The radius of gyration of the ball abou...

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  19. A wheel is rolling uniformly along a level road without slipping...

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  20. A uniform circular ring of radius R is first rotated about its h...

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