To move an object with constant acceleration, you need to apply a force continuously. In order to maintain a constant acceleration, the force must be applied consistently throughout the motion. It is not sufficient to apply the force only once.
According to Newton's second law of motion, the net force acting on an object is directly proportional to its acceleration. The equation can be written as F = ma, where F is the net force, m is the mass of the object, and a is the acceleration. If you want to maintain a constant acceleration, the net force applied to the object must remain constant as well.
Applying a force continuously ensures that the net force remains constant, allowing the object to maintain its acceleration. If the force is applied for only a brief moment, the acceleration will not remain constant, and the object's motion will change accordingly.
It's important to note that in real-world scenarios, factors such as friction and air resistance can affect the motion of an object. These forces may require adjustments in the applied force to maintain a constant acceleration. However, in an idealized scenario with no external forces, a consistent force is required throughout to achieve constant acceleration.