Unit Conversions: A Short Drive Home (part 2)

There are several ways to convert the average speed into meters per second.

1. Start with the answer to (a) and convert km/h to m/s. Two conversion factors are needed—one to convert hours to seconds, and another to convert kilometers to meters.

2. Multiplying by these yields

   $$\text{Average}\text{speed}=30.0\frac{\text{km}}{\text{h}}\times \frac{1\text{ h}}{\text{3,600 s}}\times \frac{1,000\text{ m}}{\text{1 km}}$$
   $$\text{Average}\text{speed}=8.33\frac{\text{m}}{\text{s}}$$