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A circular disc A of radius r is made fr...

A circular disc A of radius r is made from an iron plate of thickness t and another circular disc B of radius 4r is made from an iron plate of thickness `t//4`. The relation between the moments of inertia `I_(A)` and `I_(B)` is (about an axis passing through centre and perpendicular to the disc)

A

`I_A gt I_B`

B

`I_A = I_B`

C

`I_A lt I_B`

D

depends on the actual values of t and r.30.5 m

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The correct Answer is:
C
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MOTION-ROTATIONAL MOTION -Exercise - 1
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  2. Two discs have same mass and thickness. Their materials are of densiti...

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  3. A circular disc A of radius r is made from an iron plate of thickness ...

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  4. Three thin uniform rods each of mass M and length L and placed along t...

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  5. Three rings, each of mass P and radius Q are arranged as shown in the ...

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  6. The torque needed to produce an angular acceleration of 18rad/"sec"^2 ...

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  7. The product of moment of inertia (I) and angular acceleration (alpha) ...

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  8. A disc of radius 2m and mass 200kg is acted upon by a torque 100N-m. I...

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  9. The dimensions of torque are :

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  10. On applying a constant torque on a body-

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  11. A wheel starting with angular velocity of 10 radian/sec acquires angu...

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  12. When a steady toqrue or couple acts on a body, the body

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  13. The radius of gyration of a body depends upon

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  14. Equivalent to force in rotational motion is

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  15. Torque/moment of inertia equals to

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  16. The angular velocity of a body is vec (omega)- = 2 hat(i) + 3 hat(j) ...

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  17. A force of (2 hati - 4 hatj + 2 hatk )N act a point (3 hati+2 hatj -4 ...

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  18. A wheel has moment of inertia 5 xx 10^(-3) kg m^(2) and is making 20 "...

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  19. The moment of inertia of a body about a given axis of rotation depends...

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  20. Two rotating bodies have same angular momentum but their moments of in...

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