Question

A runner starts from $O$ and goes to $O$ following path $OQRO$ in $1hr$. What is net displacement and average speed?

• A. 0, 0 km/hr
• B. 0, 3.57 km/hr
• C. 0, 2.57 km/hr
• D. 0, 1 km/hr

Answer 1

Answer: (B)

Net displacement is zero
Total distance covered $=\frac{circumference}{4}$
$=\frac{2\left(1\right)}{4}+2=\frac{}{2}+2=3.57$
Average speed$=\frac{totaldistance}{time}$
$=\frac{3.57}{1}=3.57$ km/h