Which of the following terms describes the motion of an object moving towards the RADAR?

The term that best describes the motion of an object moving towards the RADAR is relative motion. In the context of RADAR systems, relative motion refers to the change in position of an object concerning the RADAR unit itself. When an object approaches the RADAR, it creates a scenario where the RADAR measures the speed and distance of that object by observing the changes in the returned signals. This dynamic is crucial for understanding speed detection, as the movement toward the sensor impacts the readings and calculations performed.

In this situation, relative motion is key, as it takes into account the interaction between the RADAR and the target object, allowing for accurate measurements of the object's speed and direction. Recognizing the relative motion facilitates a more precise interpretation of the data obtained from the RADAR system.

Other options, although relevant to different contexts in motion, do not specifically capture this aspect. Angular motion pertains to rotation around a point, positive motion is not a standard term in this context, and negative motion might imply movement away from an origin or point of reference, which contradicts the scenario depicted where the object is approaching the RADAR.