Question

Две машины едут по загородному шоссе со скоростью 90 км/ч, сохраняя дистанцию 90 м. Минуя знак ограничения скорости, каждая из машин резко сбрасывает скорость до 50 км/ч. Каким после этого будет расстояние между машинами?

Answer 1

90 м=0,09 км
Вторая машина проедить 90 м до знака  за время  t=0,09 :90=0,001=1/1000 ч
За это время первая машина уедет от знака в перед на расстояния  50*1/1000=0,05 км=50 метров
Ответ 50 метров

Answer 2

Calculation of the Distance Between the Cars

To calculate the distance between the two cars after they both reduce their speed from 90 km/h to 50 km/h, we need to consider the initial distance between the cars and the change in their speeds.

Given: - Initial speed of both cars: 90 km/h - Initial distance between the cars: 90 m - Final speed of both cars: 50 km/h

To find the new distance between the cars, we can use the formula:

New Distance = Initial Distance + (Initial Speed - Final Speed) * Time

In this case, the initial distance is 90 m, the initial speed is 90 km/h, the final speed is 50 km/h, and the time is not provided. We need to find the time it takes for both cars to reduce their speed.

To calculate the time, we can use the formula:

Time = Distance / Speed

Since the initial distance is given as 90 m and the initial speed is 90 km/h, we can calculate the time it takes for both cars to reduce their speed:

Time = 90 m / (90 km/h - 50 km/h)

Now let's calculate the time and substitute it into the formula to find the new distance between the cars.

Calculation Steps:

1. Convert the initial speed from km/h to m/s: - Initial speed = 90 km/h = 25 m/s

2. Calculate the time it takes for both cars to reduce their speed: - Time = 90 m / (25 m/s - 13.89 m/s) = 90 m / 11.11 m/s = 8.1 seconds

3. Calculate the new distance between the cars using the formula: - New Distance = Initial Distance + (Initial Speed - Final Speed) * Time - New Distance = 90 m + (25 m/s - 13.89 m/s) * 8.1 s

Now let's calculate the new distance between the cars.

Calculation:

New Distance = 90 m + (25 m/s - 13.89 m/s) * 8.1 s

New Distance = 90 m + 11.11 m/s * 8.1 s

New Distance = 90 m + 89.991 m

New Distance = 179.991 m

Therefore, after both cars reduce their speed from 90 km/h to 50 km/h, the new distance between the cars will be approximately 179.991 meters.