Question

Человек 2 минуты шел со скоростью 3,6 км/ч, а потом пробежал 60 м со скоростью 3 м/с. Определите среднюю скорость человек

Answer 1

Средняя скорость по определению
V = L/t
L1 = v1*t1 = (3.6*1000/3600)*(2*60) = 120 м
t2 = L2/v2 = 60/3 = 20 сек
V = (L1 + L2) / (t1 + t2) = (120 + 60) / (120 + 20) = 180/140 = 1.28 м в сек

Answer 2

Calculation of Average Speed

To calculate the average speed of a person who walks for 2 minutes at a speed of 3.6 km/h and then runs for 60 meters at a speed of 3 m/s, we need to convert the units to ensure consistency.

First, let's convert the walking speed from km/h to m/s: - 3.6 km/h = (3.6 * 1000) m / (60 * 60) s = 1 m/s.

Next, let's calculate the time taken to walk: - 2 minutes = 2 * 60 = 120 seconds.

Now, let's calculate the time taken to run: - Distance = 60 meters. - Speed = 3 m/s. - Time = Distance / Speed = 60 / 3 = 20 seconds.

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

Total distance = Distance walked + Distance run = 0 + 60 = 60 meters. Total time = Time taken to walk + Time taken to run = 120 + 20 = 140 seconds.

Finally, we can calculate the average speed: - Average speed = Total distance / Total time = 60 / 140 = 0.4286 m/s.

Therefore, the average speed of the person is approximately 0.4286 m/s.

Please note that the above calculation assumes a constant speed throughout the walking and running durations.