Anonymous
Anonymous asked in Science & MathematicsPhysics · 8 months ago

# Couldn't we make a car that runs on magnets instead of gasoline?

Like if you took a magnet and suspended it in front of the car using a couple of strong wires to hold it in place, would the magnet not pull the car forward? And when you needed to turn, you turn the magnet and front wheels to direct the car when you need to go. But turning it on and off might be an issue. Maybe an electric magnet would work with a good enough battery. Or if you had strong brakes it would stay in place or stop. To go in reverse you could turn the magnet around to push the car instead of pull it. What are your thoughts?

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• Anonymous
8 months ago

Is this like dangling a carrot in front of a donkey to cause it to move forward? That can work, but when the donkey finally realises it can't get the carrot, it stops.

You could try a magnet in front of a car, but a car is lifeless. It has no reason to 'want' a magnet. So it would never move.

• Jim
Lv 7
8 months ago

Great idea.

That is the principle of an electric car.

• 8 months ago

That is a phenomenal idea, why has no one thought of it before? It is similar to the Hog and corn cob idea.

Go do it.

• 8 months ago

Simple answer, no, not that way -- the magnet would have to be more massive than the vehicle, which would make the whole rather energy prohibitive.

The best approach would be a maglev system, but that would mean rails from point a to point b, and be worthwhile only with public transportation systems. Even then, it doesn't become economical until the system covers relatively large distances.

• Anonymous
8 months ago

• cosmo
Lv 7
8 months ago

If you are suspending the magnet from the front of the car, the "forward" pull of the magnet is exactly cancelled by the backward force on the structure suspending the magnet --- net force zero, and no movement.

• 8 months ago

That is like trying to lift yourself off the ground by pulling on your boots. It won't work for many reasons:

Every action has an equal and opposite reaction

Conservation of momentum would be violated

Conservation of energy would be violated

• Vaman
Lv 7
8 months ago

Action and reaction will be equal. If magnet pulls then car will pull it back. Car will not move.

• 8 months ago

As you know the magnetic field only acts over a short distance.  So the car would move forwards a few cm until it hit the magnet.  Of course if you wished to get the magnet to move ( given it is being pulled back by the car) you could get a car, attach a tow rope and pull the magnet slowly.

• Rick B
Lv 7
8 months ago

You can't really be this dumb. Nice try troll.