Question

Автомобіль масою 3 т рухається рівномірно зі швидкістю 36 км/год. Визначте потужність, яку розвиває двигун автомобіля, якщо коефіцієнт тертя 0,06. Вважайте, що g = 10 м/с2

Answer 1

Дано:
m = 3·103  кг
v= 36 км/ч= 10 м/с
μ = 0,06
P -?
Решение:
Мощность равна работе в единицу времени Работа совершается против силы трения Сила трения                                                                                                          Путь, пройденный автомобилем                                                                                                                                  Тогда мощность будет равна                                                                                               Відповідь: Г

Answer 2

Calculation of Power

To calculate the power developed by the engine of a car, we can use the formula:

Power = Force x Velocity

In this case, the force can be calculated using the equation:

Force = Mass x Acceleration

Given that the mass of the car is 3 tons (or 3000 kg) and the acceleration due to gravity is 10 m/s^2, we can calculate the force:

Force = 3000 kg x 10 m/s^2 = 30,000 N

The velocity of the car is given as 36 km/h, which needs to be converted to m/s:

Velocity = 36 km/h x (1000 m/1 km) x (1 h/3600 s) = 10 m/s

Now, we can calculate the power:

Power = Force x Velocity = 30,000 N x 10 m/s = 300,000 W

Therefore, the power developed by the engine of the car is 300,000 watts.