A vehicle starts from rest at 4 m/s, and the tires apply a tractive (forward) force of 10,000 N. The car has a mass of 800 kg. Just before the car passes point B, it starts to skid.

a) What is the speed of the vehicle?
b) What is the magnitude of the frictional force?
c) What is the coefficient of friction between the tires and the road?
d) What is the acceleration of the car?