Relative motion refers to the movement of an object in relation to another object. It takes into account the perspective of the observer and how the objects are moving relative to each other.
In 1 dimension, relative motion only considers movement along a straight line. In 2 dimensions, it takes into account movement in two perpendicular directions, typically represented by the x and y axes.
Relative velocity is the rate at which the distance between two objects is changing. Relative acceleration, on the other hand, is the rate at which the relative velocity is changing over time.
In 1 dimension, relative motion can be calculated using the formula Δx = xf - xi, where Δx is the change in position, xf is the final position, and xi is the initial position. In 2 dimensions, the Pythagorean theorem can be used to calculate the total displacement, and trigonometric functions can be used to determine the direction of motion.
Relative motion is used in various fields, including physics, engineering, and navigation. Some real-life applications include calculating the velocity of a moving vehicle, determining the trajectory of a projectile, and predicting the movement of celestial bodies.