Question

question 2.
sarah and her friends are conducting an investigation about speed during their schools field day.
they measured the time it took for students to run different distances.
which two of the following measurements would sarah need to calculate the average speed of a runner?
a. the distance the runner covered.
b. the runners height.
c. the time taken to complete the run.
d. the runners age.
e. the runners shoe size.

Explanation:

Step1: Recall the formula for average speed

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

Step2: Analyze each option

• Option A: The distance the runner covered (\(d\)) is needed as per the formula \(v=\frac{d}{t}\).
• Option B: The runner's height has no relation to the formula \(v = \frac{d}{t}\).
• Option C: The time taken to complete the run (\(t\)) is needed as per the formula \(v=\frac{d}{t}\).
• Option D: The runner's age has no relation to the formula \(v = \frac{d}{t}\).
• Option E: The runner's shoe size has no relation to the formula \(v = \frac{d}{t}\).

Answer:

A. The distance the runner covered, C. The time taken to complete the run.