a car travels at 25m/s on a flat stretch of road. The driver must maintaint he pressure on the accelerator to keep the care moving at this speed. What is the net work done on the car over a distance of 250m?

the net work done on the car, by the driver, is ZERO

the force is applied internally to the moving reference frame of the car

this would be like sitting in a wagon and trying to move it by pushing on the inside -- no net work

To find the net work done on the car, we can use the formula:

Net work (W) = Force (F) × Distance (d) × cos(θ),

where F is the force applied on the car, d is the distance traveled, and θ is the angle between the force and the direction of motion.

In this case, since the car is moving on a flat stretch of road, there is no vertical force involved, so θ is 0 degrees. Therefore, cos(θ) = cos(0) = 1.

Now, let's find the force applied on the car. The force required to maintain a constant speed on a flat road comes from the resistance forces acting against the car. The main resistance forces are aerodynamic drag and rolling resistance.

Let's assume that these resistance forces are balanced by the force applied by the driver, so the net force on the car is zero (since the car is traveling at a constant speed). Therefore, the force applied by the driver is equal in magnitude but opposite in direction to the resistance forces.

Now, the net work done on the car is zero since there is no net force acting on it. The force applied by the driver only counteracts the resistance forces, resulting in no work done.

So, the net work done on the car over a distance of 250m is 0 Joules.