Motion described from a particular reference point is called relative motion. It is the concept of observing an object's movement relative to a specified frame of reference, which could be a stationary object or observer. The description of motion may vary based on different reference points chosen.
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Motion is relative, meaning it must be described with respect to a reference point or frame of reference. This is because direction and speed are defined in relation to the reference point, and an observer's view of motion can change depending on their perspective. Without a reference point, it would be impossible to determine if an object is moving or at rest.
Both motion reference point and displacement are related to the position of an object. The motion reference point is the stationary point from which the motion of an object is described, while displacement is the change in position of an object relative to its initial position. Both concepts help to describe the motion of an object in a specific frame of reference.
Introduction of motion
An example of describing an object's motion in relation to a reference point is: "The car moved northwards from the stop sign at the intersection." Here, the reference point is the stop sign, and the car's position and direction of motion (northwards) are described in relation to that reference point.
Motion is described with respect to a frame of reference, which is a point of view used to measure and describe the position, speed, and acceleration of objects in motion. This frame of reference can be stationary or moving, depending on what is being observed.