Question

Первую половину трассы конькобежец пробежал с постоянной скоростью 6м /с а вторую со скоростью 12м /с определите среднюю скорость движения конькобежца по всей трассе

Answer 1

6+12=18
18/2=9 средняя скорость

Answer 2

12+6/2= 9 м/с Кажется так

Answer 3

Calculation of Average Speed

To calculate the average speed of the skater over the entire distance, we can use the formula:

Average Speed = Total Distance / Total Time

In this case, the skater covers the first half of the distance at a constant speed of 6 m/s and the second half at a speed of 12 m/s. Let's assume the total distance is D.

The time taken to cover the first half of the distance can be calculated using the formula:

Time taken for the first half = Distance / Speed = D / 6

Similarly, the time taken to cover the second half of the distance can be calculated using the formula:

Time taken for the second half = Distance / Speed = D / 12

The total time taken to cover the entire distance is the sum of the time taken for the first half and the time taken for the second half:

Total Time = D / 6 + D / 12

Now, we can substitute the values into the formula for average speed:

Average Speed = D / (D / 6 + D / 12)

Simplifying the equation:

Average Speed = 2 * (D / (D / 6 + D / 12))

Let's calculate the average speed using this formula.