Final answer:
According to Newton's first law of motion, an object at rest tends to stay at rest and an object in motion tends to stay in motion with a constant velocity, unless acted upon by a net external force. In this case, the object has a mass of 5.00 kg and is resting on a frictionless surface. Therefore, the object's state is at rest (D).
Step-by-step explanation:
According to Newton's first law of motion, an object at rest tends to stay at rest and an object in motion tends to stay in motion with a constant velocity, unless acted upon by a net external force. In this case, the object has a mass of 5.00 kg and is resting on a frictionless surface, meaning there are no external forces acting upon it. Therefore, the object's state is at rest (D).