Відео

If it's attached to the car, the car 'feels' the magnet's reaction force (since it's attached). If it isn't attached, the car cannot 'feel' the reaction force.

He does touch 200,000 volts (more or less) in the video.

Why should we do what you've already seen?

@@JeffersonLab Because I want to know why it won't work. That's why you put up this video.

It doesn't work for the reason we said. All forces (the action and the reaction) are acting on the car. Sit on a bike and push on the handlebars. The bike doesn't move because, even though you are pushing the bike forwards with your hand, some other part of you is pushing backwards on the bike by the same amount. The action and the reaction forces are all acting on the bike. Now, get off the bike and, while standing on the ground, push on the handlebars with your hands. Now, the bike moves because the action force acts on the bike while the reaction force acts on the earth.

@@JeffersonLab I'm a visual learner. I'm sure your words are nice and they're probably true but if I wanted to read about it, I'd read a paper on it elsewhere. I'm here on UA-cam to watch and learn because it's a video channel. You're here on UA-cam making a "video" about it because the idea is baffling a lot of people and it's a popular scientific inquiry right now. A 10-second video will make more sense to me than 3 minutes of words. I understand your example of pushing the handlebars. My question is would the same be true if I was sitting in a wheelchair and exerted force on the wheels? Of course we've all seen this happen. What if you used a magnet in front of the wheels and steel baffles around the wheel? Will the wheelchair move? Is that the basis of an electric car?

Depends on where the magnet is. If the magnet is supported independently of the wheelchair, then the wheelchair can be made to move, just like what happens to the car in this video. If the magnet is supported by the wheelchair, then the wheelchair will not move, just like what happens to the car in this video.

Oxygen by mass. Hydrogen by number. If you have 10 pennies and one quarter, which to you have more of?

If the machine arm is attached to the car, then it will work as well as suspending the magnet in front of the car with a stick. If you're going to go through all that trouble, program the machine arm to push against the ground. At least that way, the car will move.

No. The most you would get is a relative shift in the position of the car and magnet. The center of mass of the system would remain in one place, so the car would move backwards as the magnet was moved forwards (assuming no friction).

Ambient sound.

That's essentially how maglev trains work. It isn't that you can't propel something with magnetism, it's that you can't to it for free. The 'fishing pole with a magnet' concept doesn't work, but there are lots of ways that do work. It just requires the expenditure of energy.

@@JeffersonLab definitely agreed

Beats the alternative.

Depends. What are you trying to do?

Only if the floor was hot lava. He stands on the floor while touching the Van de Graaff in this video. He didn't die. Ending up on the floor accidentally isn't materially different than ending up on the floor intentionally. The results would be the same.

Okay, so you have remote controlled vehicles. How are you making them move? With a motor? If that's the case, then what's the point of the magnets? Remove the magnets and use the vehicles as they are. As far as a flexible cable... Instead of hanging one magnet by a string, as was done in the video, replace the string with a rubber band. That's effectively a flexible cable. Won't make a difference.

"Like, there was zero mention that there isn't enough amperage to kill a person." - Yes, there was. It was talked about for nearly a minute, starting around 6:25. For a video that's only about 8 minutes long, that's nearly 12 percent of the time dedicated to this. I don't that qualifies as 'zero mention'. "Birds aren't electrocuted because wires are insulated" - Transmission wires are not, in general, insulated. The short runs that go to individual houses are insulated, since they are low to the ground, are at a relatively low voltage, and are far more likely to be touched. The rest, though, are not insulated. It just isn't worth the cost to do it. That's why the wires are so high up and so far apart. Air is used as the insulation. Of course, underground transmission wires would need to be insulated, but you don't get too many birds landing on those. (And, the bulk of the transmission wires are aluminum, not copper. Aluminum isn't as good a conductor as copper, but it costs a lot less and it doesn't weigh nearly as much, so you don't need to build as many transmission towers. It doesn't make sense to throw away that weight savings by wrapping each wire in half a foot of rubber.) Glad you enjoyed the video, though!

Not quite.

@@JeffersonLab ok, looked again: 2 males, 2 females

1. Sure. A person could hold a magnet while sitting in a car. Nothing is stopping them from doing so. 2. Is this battery powered arm reaching out and grabbing something so that it can pull the car forward? Otherwise, it's not going to work.

Okay. I'll believe it when I see it.

That's basically a train, right? One large engine can be more efficient than many smaller engines, but the use of magnets in pace of a physical connection doesn't change things.

It would not.

Are the cars intertwined in such a way that it's effectively one car? If so, then no.

...has nothing to do with this.

Correct, it will not work. It's no different than the two models that are in the video. If one car is going to grab the back of the other car with some sort of lip, why not make it official and just weld the two cars together? And then, you might as well remove the wheels from one of the two cars. After that, you're right back to what's in the video - two magnets attached to the same car. All forces are acting on the car, so nothing happens. Sit on a bike and push on the handlebars. The bike won't move. Get off the bike and push on the handlebars and the bike will move (as you and the earth move in the opposite direction).

Is the umbrella attached to the chair? If so, then it won't work (assuming the umbrella catches all of the air). Is the umbrella attached to something other than the chair? Then, yes, you'll move, but not in the direction of the umbrella. You'll move in the direction opposite to the direction that the air blower is pointing. And, actually, the umbrella is redundant in this set-up. If you inflate a balloon and let it go, it flies away without benefit of a nearby umbrella. There's no functional difference between air being blown out of a balloon and air being blown out of an air blower.