Question

A car accelerated from initial position and then returned at initial point, then

• A. average velocity is zero but average speed is non-zero.
• B. average speed is zero but average velocity is non-zero.
• C. both speed and velocity has non zero average.
• D. both speed and velocity has zero average.

Answer 1

The correct option is A average velocity is zero but average speed is non-zero.

As the net displacement = 0
Hence, average velocity = 0; but average speed is non-zero as the distance is non-zero

Also,
$\frac{|Averagevelocity|}{|Averagespeed|}\le 1\Rightarrow |Av.speed|\ge |Av.velocity|$