Question

an olympic runner completes the 200 - meter sprint in 23 seconds. what is the runner’s average speed? (round your answer to the nearest tenth of a meter per second.)
0.9 m/s
1.2 m/s
8.7 m/s
10.1 m/s

Explanation:

Step1: Recall the formula for average speed

The formula for average speed \( v \) is \( v=\frac{d}{t} \), where \( d \) is the distance and \( t \) is the time.

Step2: Identify the given values

Here, the distance \( d = 200\) meters and the time \( t = 23\) seconds.

Step3: Calculate the average speed

Substitute the values into the formula: \( v=\frac{200}{23}\approx8.7 \) m/s (rounded to the nearest tenth).

Answer:

C. 8.7 m/s