Question

ПЛЗ ПОМОГИТЕ и желательно в течение 10 минут 1. Гоночный автомобиль за 10мин проезжает путь равный 50км. Определите его среднюю скорость? 2. Лучшие конькобежцы дистанцию 1500м пробегают за 1мин 52,5 с. С какой средней скоростью они проходят эту дистанцию? 3. Лыжник,спускаясь с горы, проходит 50м за 5с. Спустившись с горы и продолжая двигаться, он до полной остановки проходит ещё 30м за 1,5с. Найдите среднюю скорсть лыжника за всё время движения?

Answer 1

Ответ:

1. 50:10=5 км/мин

5 км/мин= 5*60 км/ч= 300 км/ч

2. 1 мин 52,5 с = 60+52,5 с=112,5 с=112,5/60 мин= 112,5/(60*60) ч = 0,03125 ч

1500 м = 1,5 км

1,5/0,03125= 48 км/ч

Answer 2

Объяснение:

1. Дано: С.И. Решение:

t=10 мин. 600сек. V=S/t

S=50 км. 50000м. V= 50000м/600сек=

V=? 83,3м = 83,3м

Ответ: ~83,3м.

2.

Answer 3

Calculating Average Speeds

1. Calculating the Average Speed of a Racing Car - To calculate the average speed of a racing car, we can use the formula: average speed = total distance / total time. - In this case, the racing car covers a distance of 50 km in 10 minutes.

The average speed of the racing car can be calculated as follows: - average speed = 50 km / (10 minutes / 60) = 300 km/h. - Therefore, the average speed of the racing car is 300 km/h. [[1]]

2. Determining the Average Speed of the Best Skaters - The best skaters cover a distance of 1500 m in 1 minute 52.5 seconds.

The average speed of the skaters can be calculated as follows: - Convert 1 minute 52.5 seconds to seconds: 1 minute 52.5 seconds = 60 + 52.5 = 112.5 seconds. - average speed = 1500 m / 112.5 s ≈ 13.33 m/s. - Therefore, the average speed of the skaters is approximately 13.33 m/s. [[2]]

3. Finding the Average Speed of the Skier - The skier covers 50 m in 5 seconds while descending the mountain and then covers an additional 30 m in 1.5 seconds after reaching the bottom.

The total distance covered by the skier is 50 m + 30 m = 80 m. The total time taken is 5 seconds + 1.5 seconds = 6.5 seconds.

The average speed of the skier can be calculated as follows: - average speed = 80 m / 6.5 s ≈ 12.31 m/s. - Therefore, the average speed of the skier for the entire duration of movement is approximately 12.31 m/s. [[3]]