How Electricity Actually Works

@carlsbad 

Are you seriously telling scientists who have researched this, modelled it, simulated it, and know all the forces in detail of how this works, that they are wrong?

The "car" they made goes in exactly the same direction as the wind and goes 2.5 times faster than the wind. They are going down-wind at 2.5 times the wind speed.

The bernoulli forces are similar to a plane. Faster moving air is lower pressure. They create a low pressure so that the air on the opposite side pushes towards the low pressure area.

@deludedaudiophile Well, I’m a physicist so no, I’m not saying physicists are wrong. I’ll saying that some laypeople trying to understand physics haven’t gotten it yet.

BTW, I do know bernoulli’s equation. It is what makes a plane fly, it isn’t a magic equation that causes a sail to push the winds.

Good luck. Hope you find that physics teaching gig you’re looking for.

Jerry

PS  Here is another physics demonstration you should appreciate, a ramp that shoots a ball higher than the ball was at the start.  

@carlsbad ,

BTW, I do know bernoulli’s equation. It is what makes a plane fly, it isn’t a magic equation that causes a sail to push the winds.

No luck needed. I have taught physics. At the university level. Technically I was just the TA, but I essentially taught a few courses.

Perhaps you need to read less and criticize more?

In the faster than wind car (in the direction of wind), the rotating propeller provides the speed differential between the car and the wind hence generating thrust beyond the speed of the wind.

And here, before you teach your next class, the physics of sailing.

https://physicstoday.scitation.org/doi/10.1063/1.2883908

p.s. I will take that apology at any time.

@deludedaudiophile I suggest you step away from the keyboard and go sleep off whatever you're drinking.  You're embarassing yourself.  Like how you messed up your attempted slam of me.

I hadn't seen the physics today article but want to compliment them in saying exactly what I posted above.  perhaps you didn't read what I wrote, or perhaps you don't understand the vector math explanation that i gave.  

But I'll be honest now. Give up on physics and find another job.  You need money to buy audio equipment.

Jerry

The Vector math explanation YOU gave is wrong. They definitely did not say what you said. The vector has effect, but that is it. It does not define the speed. It is akin to angle of attack. However, the primary force is Bernoulli effect. To that end, the shape of the sail has a large effect as it forms the wing. Trade-off losses versus lift for maximum speed for given hull drag at a given speed. Having a hard time believing you are a physicist since you don’t seem to have understood the article and certainly not to any level of nuance.

Anyone who reads that article, even laypeople, will see that you are wrong.

https://physicstoday.scitation.org/doi/10.1063/1.2883908

Moving air has kinetic energy that can, through its interaction with the sails, be used to propel a sailboat. Like airplane wings, sails exploit Bernoulli’s principle. An airplane wing is designed to cause the air moving over its top to move faster than the air moving along its undersurface. That results in lower pressure above the wing than below it. The pressure difference generates the lift provided by the wing.

The wind is doing two things,” said Margot Gerritsen, an engineering professor at Stanford. “It’s pushing, but there’s also a part of this wind that is dragging. That dragging is done with this force called lift."

“Lift,” in the case of a sailboat, doesn’t mean “up” although it does in the case of an airplane. In fact, the physics that allow an airplane to fly are the same physics that allow a sailboat to travel faster than the wind. The difference is that airplanes lift up off the ground, and sailboats lift parallel to the ground— as if they’re flying sideways.