Recent content by r0ot

Since your "liquid" is dependent on cold temperature as an activation switch, you also need to consider situations of intense heat such as entering Earth's atmosphere. Sealing the hole at the next convenient time is also not a good remedy because space walking is not a trivial task, but rather...

Ok, I understand now. So in reality, starting at a height equal to the height of the loop isn't enough to completely make it through the loop. That will only get you to the top of the loop. In order not to fall once you get to the top of the loop, you need to start R/2 higher than the loop...

Thanks, that helps a lot. I got the 1/2R information at http://physics.about.com/cs/gravit1/a/010703.htm , so I assume the information to be valid. His calculations assume a frictionless track as well, so maybe you can shed some light on why he arrived at 1/2R.

Hi, part my project involves designing a vertical loop on a roller coaster that is not to exceed 5 G. The weight of the coaster is 4.5 x 10^4 N. But, I don't know how high I need to start the coaster so that there is enough mechanical energy to make it through the loop. I read online that the...