If `a_(r)` and `a_(t)` represent radial and tangential accelerations, the motion of a particle will be uniformly circular if

Options

A. `a_(r) =0` and `a_(t) = 0`
B. `a_(r) = 0` but `a_(t) ne 0`
C. `a_(r) ne 0` but `a_(r) =0`
D. `a_(r) ne 0` and `a_(t) ne 0`

Answer

C

Explanation

`a_(t) = (dv)/(dt)` and `a_(r) = v^(2)/r`
For uniform circular motion i.e. v = constant `a_(i) = 0`