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Two discs have same mass and thickness. ...

Two discs have same mass and thickness. Their materials are of densities `rho_(1)` and `rho_(2)` . The ratio of their moment of inertia about central axis will be

A

`rho_1 : rho_2`

B

`rho_1 rho_2 :1`

C

`1 : rho_1 rho_2`

D

`rho_2 : rho_1`

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The correct Answer is:
D
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MOTION-ROTATIONAL MOTION -Exercise - 1
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  7. The torque needed to produce an angular acceleration of 18rad/"sec"^2 ...

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

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

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  10. The dimensions of torque are :

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  11. On applying a constant torque on a body-

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

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

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  14. The radius of gyration of a body depends upon

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  15. Equivalent to force in rotational motion is

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  16. Torque/moment of inertia equals to

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

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

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

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

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