Final answer:
When a car is traveling at a constant speed, it experiences constant velocity and the net force acting on it is zero. This is according to Newton's first law of motion. Realize that a net force of zero means that an object is either at rest or moving with constant velocity, that is, it is not accelerating.
Step-by-step explanation:
b. When your car is moving at constant velocity down the street, the net force must also be zero according to Newton's first law. The car's frictional force between the road and tires opposes the drag force on the car with the same magnitude, producing a net force of zero. The car is traveling at a constant speed, it experiences constant velocity and the net force acting on it is zero.
This is according to Newton's first law of motion. Realize that a net force of zero means that an object is either at rest or moving with constant velocity, that is, it is not accelerating. body continues in its state of constant velocity until the net force becomes nonzero. Realize that a net force of zero means that an object is either at rest or moving with constant velocity, that is, it is not accelerating.