1. Modeling projectile motion subject to drag forces PHYS 361 Spring, 2011

2. projectile equations of motion 2-D motion subject to gravity and drag forces Separate differential equations of motion x component y component  If we want to solve for position, also... we need two more equations

3. Euler method x-position y-position x-velocity y-velocity first-order approximation of derivative

4. programming efficiencies 1. pre-define constants that get used in for/while loops 2. rename lengthy expressions that have a particular significance