* Newton's First Law of Motion: An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
* Constant Velocity: Constant velocity means the car is not accelerating (changing speed or direction).
* Force and Acceleration: Newton's Second Law states that force equals mass times acceleration (F = ma). If there's no acceleration, there's no net force acting on the car.
Forces acting on a car in motion:
* Forward Force (Thrust): This is the force generated by the engine, pushing the car forward.
* Air Resistance (Drag): This is the force opposing the car's motion due to friction with the air.
* Rolling Resistance: This is the force opposing motion due to friction between the tires and the road.
* Gravity: This force acts downward, pulling the car towards the Earth. This force is usually balanced by the normal force from the road pushing upwards.
Balanced Forces:
When the car is moving at a constant velocity, the forward force from the engine is exactly balanced by the forces opposing its motion (air resistance, rolling resistance). Similarly, the force of gravity is balanced by the normal force from the road.
Important Note: This doesn't mean there are no forces acting on the car, just that the forces are equal and opposite, resulting in a net force of zero.
