no net force due to newtons third, age old exhausted problem.

post less shit.

Couldn't it work if the car/train/thing is light enough and the magnet is powerful enough?

probably the magnet would be so heavy that it would overweigth the vehicle

no, because the force restricting the movement on the cart isn't entirely dependent on the cart, but also the fixture that holds the magnet steady. all the forces cancel out regardless of the comparative extent of the magnet and cart, because to hold the magnet in place, a fixture needs to exert a force equivlanet to it in the opposite direction.

This post was edited by Vegemite on Feb 19 2010 11:57am

Oh k thanks for explanation Would of been a good way to make stuff move though wouldn't it, if it worked

Turn the magnet 180 degrees than we will talk....