Clarification: The horizontal force attracting the magnet to the wall is inversely proportional to the square of the distance to the wall. Therefore the closer the magnet is to the wall, the greater the horizontal force. (Let's approximate that the wall is thin, like the side of a bookcase...
I posted this in general math, but then I saw that calculus and analysis was a more appropriate place for it. I am looking for a solution to this problem:
When a magnet is dropped from rest near an iron wall, it accelerates downward due to gravity at constant acceleration. It also...
When a magnet is dropped from rest near an iron wall, it accelerates downward due to gravity at constant acceleration. It also accelerates toward the wall, and the closer it gets to the wall, the greater the acceleration. Can anyone refer me to a solution that would give the position of the...
The standard way to measure porosity of a rock is to get the pores completely saturated with water, then weigh the rock immersed in water and again in air (there are modified balances for this). Using Archimedes' principle, you then can determine the volume of the rock. Then you dry the rock...