Question

путь в 100 метров пошёл автомобиль за 5 секунд а следующие 400 м за 15 секунд какова средняя скорость на всём пути

Answer 1

s1=100 м   t1=5 c   s2=400 м   t2=15 c   vcp=?

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vcp=(s1+s2)/(t1+t2)=(100+400)/(5+15)=25 м/с

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Answer 2

To calculate the average speed for the entire journey, we need to find the total distance traveled and the total time taken. Then, we can use the formula:

Average Speed = Total Distance / Total Time

Given that the car covered 100 meters in 5 seconds and the next 400 meters in 15 seconds, we can find the total distance and total time:

Total Distance = 100 meters + 400 meters = 500 meters Total Time = 5 seconds + 15 seconds = 20 seconds

Now, let's calculate the average speed:

Average Speed = 500 meters / 20 seconds

To get the answer in a more common unit, we can convert meters per second (m/s) to kilometers per hour (km/h):

Average Speed = (500 meters / 20 seconds) * (3600 seconds / 1000 meters) ≈ 18 km/h

So, the average speed for the entire journey is approximately 18 kilometers per hour.