Question

A man starts running with constant speed along a circular path of radius $\sqrt{2}m.$ He completes two rounds in 16 seconds. The magnitude of the average velocity in first 2 seconds is

• A. $2m/s$
• B. $1m/s$
• C. $3m/s$
• D. $26m/s$

Answer 1

The correct option is B $1m/s$

$\begin{array}{c}w=\frac{4\pi }{16}=\frac{\pi }{4}\\ in2\sec .\\ \theta =w{x}^2\\ =\frac{\pi }{2}\\ displacement=2m\\ \therefore Averagevelocity=\frac{2m}{2\sec }=1m/s\\ \therefore OptionBiscorrect.\end{array}$