A particle of mass `m` moves along a circle of 'R'. The modulus of the average vector of force acting on the particle over the distance equal to a quarter of the circle is :

Options

A. zero if the particle moves with uniform speed `v`
B. `(sqrt(2)mv^(2))/(pi R)` if the particle moves with uniform speed `v`
C. `(sqrt(2)mv^(2))/(pi R)` if the particle moves with uniform speed `v`
D. `ma` if particle moves with constant tangential acceleration 'a', the initial velocity being equal to zero

Answer

c