Question

помогите плизз экзамен скоро Под действием силы тяги 1000 Н автомобиль движется с постоянной скоростью 72 км/ч. Чему равна мощность двигател ?

Answer 1

P = FV
V = 72 км/ч = 20 м/с
P = 1000 * 20 = 20кВт

Answer 2

Calculation of Power

To calculate the power of the engine, we can use the formula:

Power = Force x Velocity

In this case, the force acting on the car is 1000 N and the velocity is 72 km/h. However, we need to convert the velocity from km/h to m/s to ensure consistent units.

Converting 72 km/h to m/s:

1 km/h = 0.2778 m/s

Therefore, 72 km/h = 72 x 0.2778 m/s = 20 m/s.

Now we can calculate the power:

Power = 1000 N x 20 m/s = 20,000 watts (W).

So, the power of the engine is 20,000 watts.

Please note that this calculation assumes ideal conditions and does not take into account any losses or inefficiencies in the engine or drivetrain.