What is the net force acting on a car moving at a constant velocity of 55 km/h?

The net force acting on a car moving at a constant velocity of 55 km/h is zero. This is because the car is moving at a constant velocity, which means that the forces acting on it are balanced and there is no acceleration. In other words, the force of the engine pushing the car forward is equal and opposite to the forces of friction and air resistance acting against it.

Zero