When an object is moving with uniform velocity, it means that its speed and direction of motion are constant. If the gravitational and applied forces acting on the object are balanced, the net force on the object becomes zero. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
When the net force is zero, as in the case of balanced gravitational and applied forces, the object experiences zero acceleration. This does not mean that there are no forces acting on the object, but rather that the forces are canceling each other out. The balanced forces result in a situation where there is no unbalanced force to cause a change in the object's velocity.
In the case of gravitational force, it acts downward toward the center of the Earth. The applied force, which could be a push or a pull, is exerted in the opposite direction. When these two forces are equal in magnitude and opposite in direction, they cancel each other out, resulting in a net force of zero.
Without a net force, there is no acceleration, and the object continues to move with a constant velocity. This scenario is often referred to as dynamic equilibrium, where the object's motion is balanced by the opposing forces acting on it.
It's important to note that while the object experiences zero acceleration, it still experiences other forces, such as friction or air resistance, which may have an impact on its motion. However, as long as these forces are also balanced, the object will maintain its uniform velocity.