A passenger of a 15m / s train sees in the window an oncoming train 150 m long for 6 seconds
| June 16, 2021 | education
A passenger of a 15m / s train sees in the window an oncoming train 150 m long for 6 seconds what is the speed of the oncoming train relative to passengers.
Initial data: V (passenger train speed) = 15 m / s; L2 (length of the oncoming train) = 150 m; t (time of passage of trains past each other) = 6 s.
The speed of the oncoming train relative to the passenger can be expressed from the formula for calculating the relative speed of trains: V1 + V2 = L2 / t, whence V2 = L2 / t – V1.
Calculation: V2 = 150/6 – 15 = 25 – 15 = 10 m / s.
Answer: The speed of the oncoming train relative to the passenger is 10 m / s.
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