**
The speed of the automobile is given as 54 km/h. To convert this to meters per second (m/s), we use the conversion factor:
\[
1 \text{ km/h} = \frac{1}{3.6} \text{ m/s}
\]
So,
\[
54 \text{ km/h} = \frac{54}{3.6} \text{ m/s} = 15 \text{ m/s}
\]
Show more…