1D Kinematics

change in position. It can be positive, negative, or zero.

uses total distance traveled, not displacement.

• $v$ constant and $a=0$.

• constant acceleration.

Note: $\Delta x$ is displacement; it equals distance traveled only if the direction of motion does not change.

explicitly eliminates time from the equations of uniformly accelerated motion.

• constant acceleration.

• $y$-axis positive upward and negligible air resistance.

• strictly vertical launch; $v_y=0$ at maximum height; negligible air resistance.

• the object returns to the same height from which it was launched.