Question

Автомобиль за первые 5 мин прошел 3 км, за следующие 2 мин – 2 км и за последние 3 мин – 1 км. Определите его среднюю скорость (в метрах в секунду).

Answer 1

T1=300 c    s1=3000 м
t2=120 с    s2=2000 м
t3=180 c    s3=1000 м
vcp=?
===
vcp=(s1+s3+s3)/(t1+t3+t3)=(3000+2000+1000)/(300+120+180)=10 м/с
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Answer 2

1. 3*5 =15 (км )- первая часть пути,
2. 2*2 = 4 (км) - вторая часть пути,
3. 1*3 = 3 (км) - третья часть пути.
4.  15 + 4 + 3 = 22  км  -- всё расстояние.
5.   5 + 2 + 3 = 10 мин --- всё время в пути.
Чтобы найти среднюю скорость, весь пройденный путь делим на все время движения
22/10  =2,2 км/мин  = 2200/60  м/сек  = 220/6 = 36,67 м/c.

Answer 3

Calculation of Average Speed

To calculate the average speed of the car, we need to determine the total distance traveled and the total time taken.

Given the following information: - The car traveled 3 km in the first 5 minutes. - The car traveled 2 km in the next 2 minutes. - The car traveled 1 km in the last 3 minutes.

We can calculate the total distance traveled by summing up the distances covered in each time interval: - Distance in the first 5 minutes: 3 km - Distance in the next 2 minutes: 2 km - Distance in the last 3 minutes: 1 km

The total distance traveled is 3 km + 2 km + 1 km = 6 km.

To calculate the total time taken, we sum up the durations of each time interval: - Time for the first 5 minutes: 5 minutes - Time for the next 2 minutes: 2 minutes - Time for the last 3 minutes: 3 minutes

The total time taken is 5 minutes + 2 minutes + 3 minutes = 10 minutes.

To convert the total time taken from minutes to seconds, we multiply it by 60: - Total time taken in seconds = 10 minutes * 60 seconds/minute = 600 seconds.

Now, we can calculate the average speed using the formula: Average Speed = Total Distance / Total Time

Substituting the values: Average Speed = 6 km / 600 seconds

To convert the average speed from kilometers per second to meters per second, we multiply it by 1000: Average Speed = (6 km / 600 seconds) * 1000 = 10 meters per second.

Therefore, the average speed of the car is 10 meters per second.