Here's why:
* 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 with the same speed and in the same direction unless acted upon by a net force.
* Balanced Forces: When forces are balanced, they cancel each other out. This means there is no net force acting on the object.
* No Net Force, No Acceleration: Since there is no net force, there is no acceleration. Acceleration is the rate of change of velocity, so if there's no acceleration, the object's velocity remains constant.
In simpler terms: Imagine pushing a box across a smooth floor. If you push with a constant force to the right, and friction pushes back with an equal force to the left, the forces are balanced. The box will continue to move at a constant speed in a straight line.
