Question

Первые 10 с мотоциклист двигался со скоростью 15 м/с, а следующие 50 с со скоростью 25 м/с. Определите среднюю скорость мотоциклиста за все время движения.

Answer 1

Средняя скорость находится делением всего пути на всё время

путь: 15м/с ·10с + 25м/с ·50с = 150м + 1250м = 1400м

Всё время: 10с + 50с = 60с

Средняя скорость: 1400м: 60с = 70/3 = 23м/c

Answer 2

S1 = V1*t1 = 15*10 = 150 (м) - путь пройденный на первом этапе
S2 = V2*t2 = 25*50 = 1250 (м) - путь пройденный на втором этапе
V = S/t =(S1+S2)/(t1+t2)=(150+1250)/(10+50)=1400/60 = 23⅓ (м/с) - средняя скорость
Ответ: 23⅓

Answer 3

Calculation of Average Speed

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

The motorcyclist traveled at a speed of 15 m/s for the first 10 seconds and at a speed of 25 m/s for the next 50 seconds.

To find the total distance traveled, we can calculate the distance covered during each time interval and then sum them up.

The distance covered during the first 10 seconds can be calculated using the formula: distance = speed × time. Therefore, the distance covered during the first 10 seconds is 15 m/s × 10 s = 150 meters.

The distance covered during the next 50 seconds can be calculated in the same way: distance = speed × time. Therefore, the distance covered during the next 50 seconds is 25 m/s × 50 s = 1250 meters.

The total distance traveled is the sum of the distances covered during the two time intervals: 150 meters + 1250 meters = 1400 meters.

To find the total time taken, we simply add the time intervals: 10 seconds + 50 seconds = 60 seconds.

Now, we can calculate the average speed using the formula: average speed = total distance / total time.

Therefore, the average speed of the motorcyclist for the entire duration of the journey is 1400 meters / 60 seconds = 23.33 m/s.

Please note that the average speed is rounded to two decimal places.