Question

На горизонтальном участке автомобиль развил скорость 72 км/ч и движется равномерно. Масса автомобиля с водителем 1800 кг. Какой процент составляет средняя сила сопротивления воздуха о веса автомобиля, если она равна 3240 ньютонов?

Answer 1

Fc/P=Fc/m*g=3240/1800*10=0,18=18%

Answer 2

Calculation of the Percentage of Air Resistance Force

To calculate the percentage of the average air resistance force in relation to the weight of the car, we need to use the following formula:

Percentage of air resistance force = (Air resistance force / Weight of the car) * 100

Given information: - Speed of the car on a horizontal section: 72 km/h - The car is moving uniformly. - Mass of the car with the driver: 1800 kg - Air resistance force: 3240 N

To calculate the air resistance force, we need to convert the speed from km/h to m/s.

1 km/h = 0.27778 m/s

Therefore, the speed of the car is:

Speed = 72 km/h * 0.27778 m/s = 20 m/s.

Now, we can calculate the air resistance force using the formula:

Air resistance force = 0.5 * air density * frontal area * coefficient of drag * speed^2

However, we don't have the values for air density, frontal area, and the coefficient of drag. Therefore, we cannot calculate the air resistance force directly.

Unfortunately, the available search results do not provide the necessary information to calculate the air resistance force or the percentage of air resistance force in this specific case.

If you have any other questions or need further assistance, feel free to ask!