# Physics 1 Kinematics Notes One-Dimensional Motion

[Chapter 2 Objectives]

BHS -> Mr. Stanbrough -> Physics -> Mechanics -> Kinematics -> this page

## What is One-Dimensional Motion?

In our study of kinematics, we will (mostly) restrict ourselves to one-dimensional motions - that is, motions along a straight line. Some examples of one-dimensional motions are:

• a car moving on a straight road
• a person walking down a hallway
• a sprinter running on a straight race course
• dropping a pencil
• throwing a ball straight up
• a glider moving on an air track
• and many others...

While it is true that this excludes many interesting motions - the motion of a baseball hit to center field is a two-dimensional motion, for example - there are at least two reasons for restricting our current study to one-dimensional motions:

• One-dimensional motion is the simplest case.
• When you continue your study of Physics in more advanced courses, you will find out that more complex two-and three-dimensional motions are often studied by decomposing them into two or three one-dimensional motions.