What is the average speed of a train on the stretch between two stations if it traveled the first half of the distance
| February 1, 2021 | education
What is the average speed of a train on the stretch between two stations if it traveled the first half of the distance between stations at an average speed of 50 km / h, and the second at an average speed of 70 km / h? Compare your answer with the arithmetic mean of the speed. Is it possible in this case to calculate the average speed as an arithmetic mean?
Decision:
vcp = 60 km / h Equal to arithmetic mean.
Yes, because v1 / v2 = t2 / t1
We know that during the trip there were only two speeds, which were on the same sections of the path
Answer: 60 km / h
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