How much work is done when a 1,000 kg car traveling at 40 m/s applies its brakes and comes to a complete stop?
a. The work done is equal to the change in energy from the KE of motion at 40 m/s to zero KE at rest.
b. The work done is zero because the car stopped.
c. The work done is equal to the initial kinetic energy.
d. The work done is proportional to the car's mass.
