Question

The average acceleration vector for a particle having a uniform circular motion in one complete revolution.

• A. A constant vector of magnitude $\frac{v^2}{r}$
• B. $\frac{v^2}{r}$ in magnitude and perpendicular to the plane of circle
• C. Equal to the instantaneous acceleration vector at the start of the motion
• D. A null vector

Answer 1

The correct option is D A null vector

The average acceleration vector will be a null vector , since in one complete round the displacement is null vector which implies that average velocity is also null vector which further implies that average acceleration will also be a null vector for a particle having a uniform circular motion.