How do I make top down car physics?

I am going to make a top down car racing game, but I dont know how to make the car move without using a bunch of trig. I am ok using that, but all of the examples I have found are not in Corona Lua language. can someone PLEASE help.

Here are some joystick examples that incorporate top down physics/movement:

http://developer.coronalabs.com/code/simple-analog-stick-joystick-module

http://developer.coronalabs.com/code/joystick

Here are some joystick examples that incorporate top down physics/movement:

http://developer.coronalabs.com/code/simple-analog-stick-joystick-module

http://developer.coronalabs.com/code/joystick