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Q.

A person  applies  a constant  force  F on a particle  of mass  m and finds that the  particle moves in a circle of radius  r with  a uniform  speed  v as seen from  an inertial frame of reference.

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a

This  is not  possible 

b

There are no other forces  on the  particle

c

The resultant of the other forces is  mv2rtowards  the center

d

The resultant  of the other forces  varies  in magnitude  as well as  in direction

answer is B.

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Detailed Solution

Centripetal force acting on the particle is given by F=mv2r

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