Q. A car runs at a constant speed on a circular track of radius 100$\ m,$ taking 62.8 $seconds$ for every circular loop. The average velocity and average speed for each circular loop respectively is

A) 10$m/s,10m/s$
B) 10$\ m/s$,0
C) $0,\ 0$
D) $0,10\ m/s$
Explanation

(d) Net displacement in one loop = 0
Average velocity $= \frac{net\ displacement}{time} = \frac{0}{t} = 0$
Distance travelled in one rotation (loop) = $2\pi r$
$\therefore Average\ speed = \frac{distance}{time} = \frac{2\pi r}{t}$
$= \frac{2 \times 3.14 \times 100}{62.8} = 10m/s.$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.