Question

ПОМОГИТЕ, ПОЖАЛУЙСТА!)Спортсмен пробегает N=10 полных кругов по беговой дорожке длиной l=0,33 км за промежуток времени t=11 мин. Определите модуль средней скорости перемещения спортсмена и среднюю скорость пути на всей дистанции.

Answer 1

0,33км=330м

t=11мин=660с

|Vср|=s/t=Nl/t=330*10/660=5м/c=17,999≈18 км/ч

Answer 2

Calculation of Average Speed

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

Average Speed = Total Distance / Total Time

In this case, the athlete completes N=10 laps, and each lap has a length of l=0.33 km. The total distance covered by the athlete is therefore:

Total Distance = N * l

The time taken to complete the laps is t=11 minutes. However, we need to convert this time to hours to match the unit of distance (kilometers). There are 60 minutes in an hour, so:

Total Time = t / 60

Now we can substitute the values into the formula to calculate the average speed:

Average Speed = (N * l) / (t / 60)

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

Average Speed = (10 * 0.33) / (11 / 60)

Average Speed = 1.98 km/h

Calculation of Average Velocity

To calculate the average velocity, we need to consider both the magnitude and direction of the displacement. In this case, the athlete completes 10 laps, which means they return to their starting point. Therefore, the displacement is zero, and the average velocity is also zero.

Average Velocity = 0

In summary, the module of the average speed of the athlete is 1.98 km/h, and the average velocity is 0.