Basic PHP Physics: Solve common physics equations and display results

This class can solve common physics equations and display results.

It provides several functions that can take input parameters for different physics equations, solve the equations and display the results.

Currently it supports the equations for:

- Getting the acceleration from the variation of velocity during a period of time
- Getting the initial or final velocity from the acceleration and the period of time
- Getting the time from the acceleration and variation of velocity
- Getting the distance from the velocity and the period of time
- Getting the velocity from the distance and the period of time
- Getting the time from the distance and the velocity