Question

1. Спортсмен за начальные 5 с. пробежал 45 м. пути, следующие 10 с бегал со скоростью5 м/с. и еще 80 м. пути пробежал со скоростью 4 м/с. Найдите среднюю скорость на всем пути. ​

Answer 1

Ответ:

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Answer 2

Calculation of Average Speed

To find the average speed of the athlete over the entire distance, we need to calculate the total time taken and the total distance covered.

The athlete ran the first 5 seconds at a speed of 45 m, the next 10 seconds at a speed of 5 m/s, and the remaining 80 meters at a speed of 4 m/s.

Let's calculate the total time taken and the total distance covered:

- Time taken for the first 5 seconds: 5 seconds - Distance covered in the first 5 seconds: 45 meters

- Time taken for the next 10 seconds: 10 seconds - Distance covered in the next 10 seconds: 5 m/s * 10 seconds = 50 meters

- Time taken for the remaining 80 meters: Distance / Speed = 80 meters / 4 m/s = 20 seconds - Distance covered in the remaining 20 seconds: 80 meters

Now, let's calculate the total time taken and the total distance covered:

- Total time taken: 5 seconds + 10 seconds + 20 seconds = 35 seconds - Total distance covered: 45 meters + 50 meters + 80 meters = 175 meters

To find the average speed, we divide the total distance covered by the total time taken:

Average speed = Total distance / Total time = 175 meters / 35 seconds = 5 m/s

Therefore, the average speed of the athlete over the entire distance is 5 m/s.