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A disc of metal is melted to recast in t...

A disc of metal is melted to recast in the form of a solid sphere. The moment of inertias about a vertical axis passing through the centre would -

A

decrease

B

increase

C

remains same

D

nothing can be said

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The correct Answer is:
A
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MOTION-10 ROTATIONAL-Exercise - 1
  1. Two spheres of same mass and radius are in contact with each other. If...

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  2. Mass M is distributed over the rod of length L. If linear mass density...

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  3. A disc of metal is melted to recast in the form of a solid sphere. The...

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  4. The M.I. of a disc about its diameter is 2 units. Its M.I. about axis ...

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  5. A rigid body in shape of a triangle has v(A) = 5 m//s darr, v(B) = 10 ...

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  6. A solid cylinder of radius R & length 3R is made of a metarial having ...

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  7. Two spheres of equal masses, one of which is a thin spheical shelll an...

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  8. A stone of mass 4kg is whirled in a horizontal circle of radius 1m and...

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  9. A circle and a square (wire frame) each of mass m are arranged as show...

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  10. A body is rotating uniformly about a vertical axis fixed in an inertia...

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  11. One end of a uniform rod of mas m and length l is clamped. The rod lie...

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  12. A rod of length L is hinged from one end. It is brought to a horizonta...

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

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  14. On applying a constant torque on a body-

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

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  16. An automobile engine develops 100H.P. when rotating at a speed of 1800...

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  17. The moment of inertia and rotational kinetic energy of a fly wheel are...

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

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  19. A torque of 2 newton-m produces an angular acceleration of 2 rad//sec^...

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  20. A rod and a block are of same mass. Initially rod is in horizontal pos...

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