Question

A car moves with a velocity of 72kmhr-1 it is brought to rest in 10s. Find the velocity in ms-1

Answer 1

To convert the velocity from kilometers per hour (km/h) to meters per second (m/s), you can use the conversion factor:

1 km/h = \( \frac{1,000 \text{ m}}{3,600 \text{ s}} \)

So, to convert 72 km/h to m/s:

\[
72 \text{ km/h} = 72 \times \frac{1,000 \text{ m}}{3,600 \text{ s}} = 72 \times \frac{1}{3.6} \text{ m/s}
\]

Now calculating:

\[
72 \div 3.6 = 20 \text{ m/s}
\]

Thus, the velocity of the car in meters per second is \( 20 \text{ m/s} \).