Question

A car moving on a straight path covers a distance of $1km$ due east in $100s$. What is the speed of the car?

• A. $1m{s}^{-1}$
• B. $10m{s}^{-1}$
• C. $100m{s}^{-1}$
• D. $10km{s}^{-1}$

Answer 1

The correct option is B $10m{s}^{-1}$

Speed is a scalar quantity. So speed is not expressed with direction.
Distance covered $=1km=1000m$

Time elapsed $=100s$

$\therefore$ Speed$=\frac{Distance}{Time}=\frac{1000}{100}m{s}^{-1}=10m{s}^{-1}$