A person applies a constant force `vecF` on a particle of mass m and finds tht the particle movs in a circle of radius r with a uniform speed v as seen from an inertial frame of reference.
A. This is not possible
B. There are other forces on the particle
C. The resultant of the other forces is `(mv^2)/r ` towards the centre
D. The resultant of the other forces varies in magnitude as well as in direction.
