"One of the more interesting memes to come out of 4chan are posts of rudimentary drawings of inventions or scenarios that, at first glance, seem to violate the laws of physics and allow for something supernatural to occur. One of the most common types of of these posts are ones related to “free energy” or perpetual motion. We’ve taken ten of these images and asked Steve Nelson, a Physics professor who holds a Ph. D. from Duke University in physics, to explain why these somewhat intuitive ideas fall flat in real life." - AJ Batac (/-_-) from Bookmarklet

Troll physics.. - !lker yoldas. )°(

haha iyi güldürdü :D - Sinan İŞLER

Something very similar to the first picture actually does work, allowing a car to "sail" into a headwind. It was pretty mindblowing. - Bruce Lewis

You can't sail directly into a wind. You can, however, tack. - Otto

A boat can't sail directly into the wind, but there's a car that can. - Bruce Lewis

Yes, a car can, but much of the energy is lost to friction of the tires on the road. - Kevin L

Here's the mind-blowing article I was thinking of: http://news.ycombinator.com/item... - Bruce Lewis

That one is going downwind, not upwind. But yeah, cool stuff. - Otto

They plan on using the same principle to make an upwind-travel vehicle: "Next summer - we go directly UP-wind faster than the wind." http://www.fasterthanthewind.org/ - Bruce Lewis

+ - Ali Oz

2.soru geçen haftaki fizik sınavı sorularımdan biriydi - Selen

؟ - Prometheus