Answer:
"Inertia will make the object at rest if its already at rest or will maintain the velocity if in motion." is the effect on the object at rest or at motion.
Explanation:
Inertia is the tendency that all object posses which can also resist the change of motion. With the help of inertia any moving object can stay in motion possessing the same with same velocity unless any external force will act on it to change its speed or the direction. Which also main the state of rest if the object is already in rest. When the mass of the object is more, it requires greater inertia and also more force to change the state of motion.
