Question

a runner races in the 100 meter dash. it takes her 10 seconds to finish. what is her average speed? 1000 m/s, 10 seconds, 10 m/s, 100 seconds

Explanation:

Step1: Recall the formula for average speed

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

Step2: Identify the given values

Here, the distance \( d = 100 \) meters and the time \( t = 10 \) seconds.

Step3: Substitute the values into the formula

Substitute \( d = 100 \) m and \( t = 10 \) s into \( v=\frac{d}{t} \), we get \( v=\frac{100}{10} \) m/s.

Step4: Calculate the result

\( \frac{100}{10}=10 \) m/s.

Answer:

The average speed is \( 10 \) m/s, so the correct option is the one with "10 m/s".