Everything in our universe moves. People, planets, and even galaxies are in constant motion. Physics gives us ways to explain motion using not only words, but also equations and graphs. This description of motion, called “kinematics,” involves properties such as position, speed, velocity, and acceleration. In this chapter, you will explore kinematics in one dimension.
The first thing physics is used to describe is motion. Motion is characterized by position, displacement, distance, speed, velocity, and acceleration. Kinematic equations show how these properties are linked; the three equations given in this chapter can be used, assuming constant acceleration, to determine the relationship between an object’s displacement, velocity, and acceleration.