Relative Velocity and Relative Acceleration

Relative velocity refers to the speed and direction of one object as observed from another moving object. For example, if you’re in a car going 60 km/h and another car is beside you going 50 km/h, the second car's velocity relative to you is 10 km/h in the opposite direction. Relative acceleration, similarly, is the rate of change of velocity between two objects. If one object speeds up while the other slows down, their relative acceleration describes how their velocities change in relation to each other. Both concepts are fundamental in understanding motion in Newtonian mechanics.