Question

The driver pushes the accelerator pedal as far down as possible. The car does not accelerate above a certain maximum speed. Explain the reason for this in terms of the forces acting on the car.

Answer 1

forces:
road pushes forward on tires, there is a limit to how hard depending on torque from drive shaft.

wind pushes back on vehicle, force increases as speed increases
so

net force forward = Froad - Fwind

a = (Froad - Fwind) / mass

when Froad = Fwind, a is zero

if a is 0, v is constant

Answer 2

Thanks Damon!!