To calculate the net work done on the car, the thermal energy generated is subtracted from the total work done by the force, resulting in 10,756 joules of net work.
The student is asking about the net work done on a car when a known force is applied over a distance, and thermal energy is generated as a result. To find the net work done on the car, one must subtract the thermal energy generated from the total work done by the force.
The total work done by the force can be calculated through the formula: work (W) = force (F) × distance (d), which in this case is 1,123 N × 18 m = 20,214 J. Given that 9,458 J of thermal energy is generated, the net work on the car is the total work minus the thermal energy: 20,214 J - 9,458 J = 10,756 J of net work.