Question

Поезд увеличивает скорость с v1=30 км/ч до v2=60 км/ч за время t=8 с. Какой путь пройдёт поезд за это время? Ускорение поезда считайте постоянным.

Answer 1

Calculation of Distance Traveled by the Train

To calculate the distance traveled by the train, we can use the formula:

distance = initial velocity * time + (1/2) * acceleration * time^2

Given: - Initial velocity (v1) = 30 km/h - Final velocity (v2) = 60 km/h - Time (t) = 8 s

We are also given that the acceleration is constant. Let's assume the acceleration is denoted by 'a'.

Using the formula above, we can calculate the distance traveled by the train.

distance = (v2 + v1) / 2 * t

Substituting the given values:

distance = (60 + 30) / 2 * 8

Simplifying the equation:

distance = 90 / 2 * 8

distance = 45 * 8

distance = 360 km

Therefore, the train will travel a distance of 360 km in the given time.