Question

Автомобиль движется со скоростью 15м/с.Пешеход может перейти проезжую часть улицы за 10 секунд. На каком минимальном расстоянии от автомобиля безопасно переходить улицу ?

Answer 1

V = 54 км/час = 54000/3600 = 15 м/с
S = vt = 15*10 = 150 м

Answer 2

Calculation of the Minimum Safe Distance

To determine the minimum safe distance for a pedestrian to cross the street, we need to consider the speed of the car and the time it takes for the pedestrian to cross.

Given: - Car speed: 15 m/s - Pedestrian crossing time: 10 seconds

To calculate the minimum safe distance, we can use the formula:

Minimum Safe Distance = Car Speed × Pedestrian Crossing Time

Substituting the given values:

Minimum Safe Distance = 15 m/s × 10 s

Calculating the result:

Minimum Safe Distance = 150 meters

Therefore, the pedestrian should safely cross the street at a minimum distance of 150 meters from the car.

Please note that this calculation assumes constant speed and a straight path for both the car and the pedestrian. It is always important to exercise caution and follow traffic rules when crossing the street.