Suppose a car with electrical engine moves uniformly with friction between wheels and the ground (neglect air resistance, energy loss, etc.). So why the car's engine power must be equal to friction's power for the car to move uniformly?
Why power of engine must be equal to power of friction
frictionkinematicspower
Related Solutions
Friction does help in movement of a wheel aka rolling motion.
See the image, the point touching the surface actually stays at rest which causes the rest of the wheel to move forward. This is caused due to friction. Now, if you don't have friction, nothing would be there to stop the wheel from spinning around its axis.
I don't think a direct answer is given in the wiki. Transmission is connected if one does not apply clutch. With engine brakes on, wheels drive the engine not the other way round. I believe the energy will be released via the heat in the engine produced by piston, gearbox and skidding (if your gears are lowered further) though mostly via adiabatic heating of the gases inside the engine by the pistons.
Best Answer
If the engine produces more power, that has to go somewhere, and in the situation you describe, it will go into kinetic energy, meaning to accelerate the car.
If it produces less power, the friction will get its missing power from kinetic energy, thus decelerating the car.
Only if the engine power matches the friction power, kinetic energy stays untouched, meaning constant speed.
That matches our everyday experience. There's always one gas pedal position for constant speed. Pushing harder (more engine power) accelerates, pushing less than that decelerates.