Final answer:
The world-class runner's average speed for a 100m dash completed in 10 seconds is calculated as 10 meters per second (10 m/s), which corresponds to option B) 10 m/s.
Step-by-step explanation:
The average speed of a world-class runner completing a 100m dash in about 10 seconds is calculated by dividing the distance by the time it took to cover that distance. Thus, the average speed, v, can be determined using the formula:
v = d/t
Where d is distance and t is time. For a 100m dash completed in 10 seconds, the average speed is:
v = 100m / 10s = 10 m/s
This means that the correct answer from the given options is B) 10 m/s. This is a straightforward application of the formula for average speed, which is routinely encountered in introductory physics courses and problems.