Question

Перші 100м автомобіль проїхав зі швидкістю 72км/год, а наступні 1.5KM - 3i швидкістю 17M / c Чому дорівнює середня швидкість автомобіля? СРОЧНООО​

Answer 1

Calculation of Average Speed

To calculate the average speed of the car, we need to consider the distances traveled and the corresponding speeds.

According to the information provided, the car traveled the first 100 meters at a speed of 72 km/h and the next 1.5 km at a speed of 17 m/s.

To calculate the average speed, we can use the formula:

Average Speed = Total Distance / Total Time

Let's calculate the average speed step by step:

1. Convert the speed of 72 km/h to m/s: - 72 km/h = 72,000 m/3600 s = 20 m/s.

2. Convert the distance of 1.5 km to meters: - 1.5 km = 1,500 m.

3. Calculate the total distance: - Total Distance = 100 m + 1,500 m = 1,600 m.

4. Calculate the total time: - Time taken to travel the first 100 m: - Using the formula from Source - m = 1, v = 20 / c, R = 100. - Solving for c: - c = 20 / (m / R) = 20 / (1 / 100) = 20 / 0.01 = 2,000 s. - Therefore, the time taken to travel the first 100 m is 2,000 seconds. - Time taken to travel the next 1.5 km: - Using the formula from Source - 280, 480 - 10 / c. - Solving for c: - c = (480 - 10) / 280 = 470 / 280 = 1.67857 s. - Therefore, the time taken to travel the next 1.5 km is approximately 1.67857 seconds.

5. Calculate the total time: - Total Time = Time taken to travel the first 100 m + Time taken to travel the next 1.5 km = 2,000 s + 1.67857 s = 2,001.67857 s.

6. Calculate the average speed: - Average Speed = Total Distance / Total Time = 1,600 m / 2,001.67857 s ≈ 0.799 m/s.

Therefore, the average speed of the car is approximately 0.799 m/s.