Question

Из одного населённого пункта в другой мотоциклист двигался со скоростью v1= 60км/ч, обратный путь он проехал со скоростью v2=15м/с. Определите среднюю скорость мотоциклиста за всё время движения?

Answer 1

V1 = 60 км/часV2 = 10 м/сек = 36 км/часВремя пути вперед t1 = S/V1Время пути обратно t2 = S/V2Общее время t = t1+t2 = S/V1+ S/V2 = S(1/V1+1/V2)Средняя скорость V = 2S/t =2S/[S(1/V1+1/V2)]=2V1*V2/(V1+V2)=2*60*36/96= 45 км/час   
вот так

Answer 2

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.

Let's assume the distance between the two locations is d.

The time taken for the forward journey can be calculated using the formula:

Time taken = Distance / Speed

For the forward journey: - Distance = d - Speed = v1 = 60 km/h

So, the time taken for the forward journey is: Time1 = d / v1 The time taken for the return journey can be calculated using the formula:

Time taken = Distance / Speed

For the return journey: - Distance = d - Speed = v2 = 15 m/s

To calculate the time taken in seconds, we need to convert the speed from m/s to km/h: v2 = 15 m/s * 3.6 = 54 km/h

So, the time taken for the return journey is: Time2 = d / v2 The total time taken for the entire journey is the sum of the forward and return journey times: Total Time = Time1 + Time2

The total distance traveled is the sum of the forward and return distances: Total Distance = 2d

Finally, we can calculate the average speed using the formula:

Average Speed = Total Distance / Total Time

Let's calculate the average speed using the given values.