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A sphere of mass m is given some angular...

A sphere of mass `m` is given some angular velocity about a horizontal axis through the center, and gently placed on a plank of mass `m`. The coefficient of friction between the two is `mu`. The plank rests on a smooth horizontal surface. The intial acceleration of the sphere relative to the plank will be:

A

zero

B

`mug`

C

`7/5 mug`

D

`2mug`

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The correct Answer is:
D
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D MUKHERJEE-MISCELLANEOUS QUESTION 1-Miscellaneous Questions-1 (Straight-Objective Type)
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  9. An object O is placed in front of a small plane mirror M(1) and a larg...

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  11. In a uniform magnetic field of 10^(-5) T in free space, the energy de...

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  12. A block of mass m is placed on a horizontal surface. The coefficient o...

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  13. An ideal liqquid flows through the horizontal pipe AB, which is of uni...

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  14. A number of spherical conductors of different radii are given charge s...

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  15. A block of mass m slides down an inclined plane which makes an angle t...

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  17. A square, conducting loop falls from rest in the xy-plane. There is a ...

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  18. A wheel of radius R rolls without slipping on the horizontal surface w...

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  19. An isolated parallel-plate capacitor of capacitor C has paltes X and Y...

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