Reference Guide

5-34 Equation Reference
Motion (8)
Variable
Description
α
Angular acceleration
ω
Angular velocity (Circular Motion), or
Angular velocity at t (Angular Motion)
ω 0
Initial angular velocity
ρ
Fluid density
θ
Angular position at t
θ 0
Initial angular position (Angular Motion), or
Initial vertical angel (Projectile Motion)
a
Acceleration
A
Projected horizontal area
ar
Centripetal acceleration at r
Cd
Drag coefficient
m
Mass
M
Planet mass
N
Rotational speed
R
Horizontal range (Projectile Motion), or
Planet radius (Escape Velocity)
r
Radius
t
Time
v
Velocity at t (linear Motion), or
Tangential velocity at r (Circular Motion), or
Terminal velocity (Terminal Velocity), or
Escape velocity (Escape Velocity)
v0
Initial velocity
vx
Horizontal component of velocity at t
vy
Vertical component of velocity at t
x
Horizontal position at t
x0
Initial horizontal position
y
Vertical position at t
y0
Initial vertical position
Reference: 3.