Question

Поезд метро достигает скорости 15 м/с за 27 секунд от начала движения.Какая его скорость при выезде последнего вагона из станции метрополитена.Длина поезда равна длине станции и равняется 90 метров.

Answer 1

А=(V1-Vo)/t=V1/t - ускорение
V²=2*a*L
V=√2*L*V1/t=√2*90*15/27=10 м/с

Answer 2

Calculation of the Speed of the Last Metro Car Leaving the Station

To calculate the speed of the last metro car leaving the station, we can use the formula:

Speed = Distance / Time

Given that the length of the train is equal to the length of the station, which is 90 meters, and the train reaches a speed of 15 m/s in 27 seconds, we can substitute these values into the formula:

Speed = 90 meters / 27 seconds

Calculating this, we find that the speed of the last metro car leaving the station is approximately 3.33 m/s.

Please note that the accuracy of this calculation depends on the accuracy of the given values and assumptions made.