Answer:


Step-by-step explanation:
Work and energy
Those are closely related concepts. Work is the product of force by displacement if they have the same direction (parallel). Work transfers energy from one form to another, or from one place to another.
Part 1
The average force of friction of the car is 8,000 N, driven for a distance of 40 Km = 40,000 m. The work done (and the energy transferred) by the car in the travel is

Part 2
Knowing the average speed of the car, we can compute the average power of the car when driving to school with the formula

This assumes the speed is constant throughout the distance traveled in a time t, thus

