Pick the correct statements:

Options

A. Average speed of a particle in a given time interval is never less than the magnitude of the average velocity.
B. It is possible to have a situation in which `|(dv)/(dt)|cancel(=)` but `(d)/(dt)|vec(v)|=0`.
C. The average velocity of a particle is zero in a time interval. It is possible that the instantaneous velocity is never zero in the interval.
D. The average velocity of a particle moving on a straight line is zero in a time interval. It is possible that the instantaneous velocity is never zero in the interval. `(` infinite acceleration are not allowed `)`

Answer

A, B, C

Explanation

since `("Distance")/(Deltat)gt=(|"Displacement"|)/(Deltat)`
`aV ` speed `gt=|aV. "velocity"|`
in uniform circular motion speed is constant but acc. `cancel(=)0`
in uniform circle motion after one round average velocity becomes zero.