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.
Here's why:
* Zero net force means no acceleration: When the forces are balanced, there's no net force acting on the car. Acceleration is directly proportional to the net force (Newton's Second Law: F = ma). So, zero net force means zero acceleration.
* Constant speed: Acceleration is the rate of change of velocity. If acceleration is zero, the velocity (which includes both speed and direction) remains constant.
Important Note: While the speed remains constant, the car might still be changing direction. For example, a car moving in a circle at a constant speed is still accelerating because its direction is changing.
