If the mass of an object does not change and a constant net force is applied to it, it produces constant acceleration.

This is described by Newton's Second Law of Motion:

F = ma

Where:

* F is the net force acting on the object

* m is the mass of the object

* a is the acceleration of the object

Since the mass (m) is constant and the net force (F) is constant, the acceleration (a) must also be constant.