Question

Автомобиль движется по шоссе со скоростью 90км/ч .Найдите силу тяги его двигателя ,если известно,что автомобиль развивает мощность 75 квт.

Answer 1

дано V=90 км/ч=90*1000/3600=25 м/с   P=75000 Вт   F- ?

P=F*V
F=P/V=75000/25=3000 Н

Ответ F=3000 Н

Answer 2

Calculating the Force of the Car's Engine

To calculate the force of the car's engine, we can use the formula:

Power (P) = Force (F) × Velocity (v)

Given: - Power (P) = 75 kW - Velocity (v) = 90 km/h

We need to convert the velocity from km/h to m/s as the unit of power is in watts (W), and 1 watt is equal to 1 joule per second.

Converting the velocity: - 90 km/h = 25 m/s

Now, we can calculate the force using the rearranged formula: Force (F) = Power (P) / Velocity (v)

Substituting the values: Force (F) = 75,000 W / 25 m/s = 3000 N

Therefore, the force of the car's engine is 3000 Newtons.

I hope this helps! If you have any more questions or need further assistance, feel free to ask.