Question

if a runner completes a 10 kilometer race in 50 minutes, what is their average speed in meters per second? 0.20 m/s 5.00 m/s 2.78 m/s 3.33 m/s

Explanation:

Step1: Convert distance to meters

Since 1 kilometer = 1000 meters, a 10 - kilometer race is $10\times1000 = 10000$ meters.

Step2: Convert time to seconds

Since 1 minute = 60 seconds, 50 minutes is $50\times60=3000$ seconds.

Step3: Calculate average speed

The formula for average speed $v$ is $v=\frac{d}{t}$, where $d$ is distance and $t$ is time. So $v = \frac{10000}{3000}=\frac{10}{3}\approx3.33$ m/s.

Answer:

3.33 m/s