The car is moving at a speed of 54 km / h. The width of the road is 6 m. The speed of a pedestrian crossing
| May 28, 2021 | education
The car is moving at a speed of 54 km / h. The width of the road is 6 m. The speed of a pedestrian crossing the road is 1 m / s. At what is the minimum distance from the car a pedestrian can start moving?
A pedestrian needs time t = s / v = 6 m / 1 m / s = 6 s to cross a road with a width of s = 6 m at a speed of v = 1 m / s.
Vehicle speed in meters per second V = 54 km / h = 54000 m / 3600 s = 15 m / s.
For 6 s, the car travels the path S = Vt = 15 m / s * 6 s = 90 m. If a pedestrian starts moving when the distance to the car is less than 90 m, then he can get under the car.
Answer: The minimum distance is 90 m.
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.
