In a popular lecture demonstration, a cylindrical permanent magnet is dropped down a long aluminum tube as shown in figure 1 belowNeglecting friction of the magnet against the inner walls of the tube and assuming that the tube is very long compared to the size of the magnet, will the magnet accelerate downward with an acceleration equal to g (free fall)? If not, describe the eventual motion of the magnetDoes it matter if the north pole or south pole of the magnet is on the lower side? I know that the magnet will not accelerate with an acceleration equal to free fall, but I am unsure about the other components of this question.
It's a ripoffAnd you know what? I'm sure hundreds of soccer moms bought them so they could watch their kids' soccer games in the comfort of a Snuggie.
HELLO the snuggie isn't a robe, it's a blanket, duh! just kidding, the only difference I can tell is that a Snuggie closes in the back as opposed to the front X_x
Snuggies are suitable for outside usage, whereas a house robe isnt.
I just want to say that Snuggies are the most disappointing thing I have seen in a long timeI thought it was like a monk robe but it's not, it opens in the backHow stupidIt is like a robe, 100%, but much MUCH cheaper quality (I didn't buy one but felt one that was at Bed Bath and Beyond - which now sells them)The material is so thin, it would keep you as warm as putting a flannel sheet over youThey really suckIf you want a snuggie, my advice is to buy a robe that is two sizes to big and wear it backwardsThen, it's your snuggie, but it doubles as a robe so you can actually use it for something normal.
Words in physics (science) should specifically address a given situation so that there may be no wiggle room in terms of understanding As I read this question, the wiggle room found is in the FIRST INSTANT of time ieYes, the magnet will fall with an acceleration equal to g, immediately after being dropped However, following that instant, the interaction between the magnet's field and the counter-magnetic field set up by the eddy currents in the Al tube caused by the falling magnet creates a magnetic force opposite in direction to g This in turn reduces the NET acceleration acting on the falling magnet until the NET force acting on it becomes zeroFrom this instant on, the magnet falls at constant velocity (ΣForces 0) as per Newton's 1st Law i.ethe magnet reaches terminal velocity This happens quickly so that the magnet falls at this constant terminal velocity for most of its journey thru the long Al tube Because the counter magnetic field is simply opposite to that of the magnet's field it doesn't matter which way (N or S pole leading) the poles of the magnet are oriented during the fall.
