* Newton's First Law of Motion (Law of Inertia): This law states that an object at rest stays at rest, and an object in motion stays in motion at a constant speed and in a straight line unless acted upon by an unbalanced force.
* Forces Acting on a Car: A car moving at a steady speed experiences several forces:
* Forward Force: The engine provides a force pushing the car forward.
* Frictional Forces: This includes air resistance (drag) and friction between the tires and the road.
* Gravitational Force: The Earth's gravity pulls the car downwards.
* Normal Force: The road exerts an upward force (normal force) on the car, counteracting gravity.
* Balance: When the car is moving at a steady speed, the forces acting on it are balanced. The forward force from the engine is equal and opposite to the frictional forces (air resistance and tire friction). Gravity and the normal force are also equal and opposite.
In Summary: The car is moving at a constant speed because the forces acting on it are in equilibrium. There is no net force causing the car to accelerate or decelerate.
