Two trains move towards each other at the same speed of 60 km / h. What is the length of the second
| January 12, 2021 | education
Two trains move towards each other at the same speed of 60 km / h. What is the length of the second train if the passenger sees the second train for 1 minute?
t = 1 min = 1/60 h.
To solve the problem, consider a frame of reference associated with the passenger of the first train. The second train moves relative to it at a speed
v = 60 + 60 = 120 km / h.
The length of the train is actually the distance traveled by the train relative to the observer during the observation time:
l = v * t = 120 * 1/60 = 2 km.
Answer: the length of the second train is 2 km.
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