i made this as a game, works ok... it does seem a bit slippery slidy ice floor though...
i added an else clause
my code exactly is:
on start of layout - gravity set to 0
every 0.00009 seconds
-----is in touch-rotate 5 degrees towards touch x,y
-------------------- Apply physics force 5 towards touch x,y at image point 1 (the rear)
-----Else- (car)set angle to car.angle degrees (this stops the car spinning randomly)
the physics for friction is all u dude