Question

Лыжник , спускаясь с горы , проходит 50 м за 5 секунд . Спустившись с горы и продолжая двигаться , он до полной остановки проходит еще 30 метров за 15 секунд. Найдите среднюю скорость лыжника за все время движения.

Answer 1

1. 50:5=10

2.30-15=15

3. 10+15

все ответ

Answer 2

Calculation of Average Speed

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

The skier first travels 50 meters in 5 seconds, and then travels an additional 30 meters in 15 seconds before coming to a complete stop.

The total distance traveled is 50 meters + 30 meters = 80 meters.

The total time taken is 5 seconds + 15 seconds = 20 seconds.

To calculate the average speed, we divide the total distance by the total time:

Average speed = Total distance / Total time = 80 meters / 20 seconds = 4 meters per second.

Therefore, the average speed of the skier for the entire duration of the movement is 4 meters per second.