Question

In uniform circular motion, the velocity vector and acceleration vector are:

• A. perpendicular to each other
• B. in the same direction
• C. opposite in direction
• D. not related to each other

Answer 1

The correct option is A perpendicular to each other

In uniform circular motion, speed is constant.

So, there is no tangential acceleration.
It has only radial acceleration $a_r=\frac{v^2}{R}$ [directed towards center] and its velocity is always in tangential direction.

So these two are perpendicular to each other.