Zero Net Force

Q
A car weighing 8000 N moves along a straight, level road at a steady 80 km/hr. The total resistive force on the car is 500 N. What is the drive force on the car?
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If the acceleration is zero, the net force on the car is also zero:
F(drive) + F(resistive) = 0
The resistive force is –500N. I will let you figure out what the drive force must be.

NOTE: The 8000N force of the car’s weight is perpendicular to the direction of motion and it is cancelled out by the resistance of the road. You can ignore it.
GK
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