Q. A particle moves along a semicircle of radius $10m$ in 5 seconds. The average velocity of the particle is
A) $2\pi\ ms^{- 1}$
B) $4\pi\ ms^{- 1}$
C) $2\ ms^{- 1}$
D) $4\ ms^{- 1}$
Explanation
(d) $Velocity\ of\ particle = \frac{Total\ displacement}{Total\ time}$
$= \frac{Diameter\ of\ circle}{5} = \frac{2 \times 10}{5} = 4\ m/s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.