Question

Дам сто балів пліз 2. Мотоцикліст рухався 2 хв зі швидкістю 36 а потім проїхав ще 0,9 км за 0,5 хв. Чому дорівнює середня швидкість руху мотоцикліста? Пліз дам сто балів срочно я вас прошу

Answer 1

Дано: V1=36 км/ч=36*1000 м/3600 с=10 м/с; t1=2 мин=120 с;

S2=0,9 км=900 м; t2=0,5 мин=30 с; Vcp - ?

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Vcp=весь путь / всё время.

S1=10*120=1200 м

Vcp=(1200 + 900) / (120 + 30)=2100 / 150=14 м/с  -  это ответ.

ИЛИ 14*3,6=50,4 км/ч.

ЗАПОМНИ

V (км/ч)=V/3,6 (м/с) и наоборот.

Answer 2

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

First, let's calculate the distance traveled in the first part of the journey. The motorcyclist traveled for 2 minutes (or 2/60 hours) with a speed of 36 km/h. Using the formula distance = speed × time, we can calculate the distance as follows:

Distance = Speed × Time Distance = 36 km/h × (2/60) h Distance = 1.2 km

Next, let's calculate the distance traveled in the second part of the journey. The motorcyclist traveled for 0.5 minutes (or 0.5/60 hours) with a speed that we don't know yet. The distance traveled in this part is given as 0.9 km.

Now, let's calculate the average speed. The average speed is defined as the total distance traveled divided by the total time taken. The total distance traveled is the sum of the distances traveled in the two parts, and the total time taken is the sum of the times taken in the two parts.

Total distance = 1.2 km + 0.9 km = 2.1 km Total time = 2 minutes + 0.5 minutes = 2.5 minutes = 2.5/60 hours

Average speed = Total distance / Total time Average speed = 2.1 km / (2.5/60) h Average speed = 2.1 km / (2.5/60) h = 2.1 km / (2.5/60) h = 50.4 km/h

Therefore, the average speed of the motorcyclist is 50.4 km/h.

Please note that the calculation assumes a constant speed throughout each part of the journey. If there were variations in speed during the journey, the average speed would be different.

Answer 3

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

The motorcyclist traveled a distance of 2 km in 2 minutes with a speed of 36 km/h. We can convert the time to hours by dividing it by 60: 2 minutes = 2/60 = 1/30 hours.

The motorcyclist then traveled an additional distance of 0.9 km in 0.5 minutes. Converting the time to hours: 0.5 minutes = 0.5/60 = 1/120 hours.

To find the total distance, we add the two distances together: 2 km + 0.9 km = 2.9 km.

To find the total time, we add the two times together: 1/30 hours + 1/120 hours = 4/120 + 1/120 = 5/120 = 1/24 hours.

Now, we can calculate the average speed by dividing the total distance by the total time: 2.9 km / (1/24 hours) = 2.9 km * 24 = 69.6 km/h.

Therefore, the average speed of the motorcyclist is 69.6 km/h.

Please note that the above calculation assumes a constant speed throughout the journey. If the speed varied during the trip, the average speed would be different.