The passenger determined that the oncoming train passed him in 10 seconds. Find the length of a train
| February 5, 2021 | education
The passenger determined that the oncoming train passed him in 10 seconds. Find the length of a train if their speed is 72 km / h?
Given:
t = 10 seconds – the time interval during which the oncoming train passed by the passenger of another train;
v1 = v2 = 72 km / h = 20 meters per second – train speed.
It is required to determine L (meter) – the length of the oncoming train.
By the condition of the problem, both trains are moving towards each other. Then, the speed of the trains relative to each other will be equal to:
v = v1 + v2 = 20 + 20 = 40 meters per second.
The length of the oncoming train will be equal to:
L = v * t = 40 * 10 = 400 meters.
Answer: the length of the oncoming train is 400 meters.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
