Projectile Motion - Template
The purpose of this CAS file is to solve some of the problems from Young and Freedman
university physics Chapter 3 - Motion in Two or Three Dimensions
The main idea is to use the Substitute command with values replaced with those from the 
problem into the relevant motion equations and use the power of CAS to Solve the 
equations. It works.
This CAS file is a template for the solution to Projectile Motion problems.
 The initial x-coordinate of the start position of the projectile
 The initial y-coordinate of the start position of the projectile
 The initial velocity of the projectile
 The angle at which the projectile is launched
 The time the projectile is in motion
 The x coordinate of the projectile at time t
 The y coordinate of the projectile at time t