To convert speed from meters per second (m/s) to miles per hour (mph), you can use the following conversion factor:

$1 \text{ m/s} = 2.23694 \text{ mph}$

Given the speed is 4.5 meters per second (m/s), the conversion to miles per hour (mph) is:

$\text{Speed (mph)} = 4.5 \times 2.23694 = 10.06623 \text{ mph}$

So, the person is traveling approximately 10.07 mph.

Would you like more details or have any questions?

Here are five related questions for further exploration:

1. How would the speed change if the distance covered in 1 second were doubled?
2. What is the equivalent speed in kilometers per hour?
3. How would you calculate the time to cover 1 mile at this speed?
4. How does this speed compare to average human running speeds?
5. What is the process for converting between other units of speed?

Tip: Always ensure consistent units when solving speed or distance problems to avoid calculation errors.