In this question, we are asked about the rate of change in momentum of an object undergoing non-accelerated motion.

Momentum is defined as the product of an object`s mass and its velocity. It is a vector quantity, meaning it has both magnitude and direction. The rate of change of momentum is equal to the force applied to the object according to Newton`s second law of motion.

Option 1 suggests that the rate of change in momentum is a non-zero constant. However, since the motion of the object is non-accelerated, it means that there is no net external force acting on the object. In such a scenario, the rate of change in momentum is zero, not a non-zero constant. Therefore, option 1 is incorrect.

Option 2 states that the rate of change in momentum is zero. This is the correct answer. In non-accelerated motion, the object maintains a constant velocity, and thus the rate of change in momentum is zero because there is no net force acting on it.

Option 3 suggests that the rate of change in momentum is not a constant. However, in non-accelerated motion, the object`s velocity remains constant, and therefore the rate of change in momentum is zero, making option