You run for 100 seconds at a speed of 5.0 m/s and then you walk for 100 seconds at a speed of 1.0 m/s. What is your average speed?
What is your average speed?
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In the first 100 sec you cover 500 m. In the second 100 sec you cover 100 m.
Therefore, you cover 600 m in 200 sec for an average speed of (600/200) m/s or 3 m/s
Average speed is just the total distance traveled divided by the total time.
You already have the total time. It's 100 + 100 = 200 seconds.
Calculate the two distances, add them together, then divide by 200:
D1 = 100 * 5 = 500 m
D2 = 100 * 1 = 100 m
Total Distance D = 600
Average speed = 600/200 = 3 m/s