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In gravity free space, a particle is in ...

In gravity free space, a particle is in constant with the inner surface of a hallow cylinder and moves in a circular path along the surface. There is some friction between the particles and the surface. The retardation of the particle is :

A

Zero

B

Independent of tha velocity

C

Proportional to its velocity

D

Proportional to the square of its velocity

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The correct Answer is:
d
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