= Chapter 2

== Uniform Motion

*Uniform motion* (aka constant-velocity motion) is straight-line motion with equal displacements during anys uccessive equal-time intervals

An object's motion is uniform iff *the position vs time graph is a straight line.*

Some equations:

$ v_x = (Delta x)/(Delta t) = (x_f - x_i)/(t_f - t_i) $

$ x_f = x_i + v_x Delta t $

$ Delta x = v_x Delta t $

== Instantaneous Velocity

Speed and direction at a specific instant of time $t$

== Acceleration

$ a_x = (Delta v_x)/(Delta t) = (v_x_f - v_x_i)/(Delta t) $

$ v_x_f = v_x_i + a_x Delta t $

$ x_f = x_i + v_x_i Delta t + 1/2 a_x Delta t^2 $

$ (v_x_f)^2 = (v_x_i)^2 + 2 a_x Delta x $
