I'm currently working on a project for projectile motion and my teacher wants to see us launch a round ball about marble(maybe smaller) sized into a ring clamp on a retort stand somewhere around the room. She suggest we all use "gravity" (a simple ramp that lets a ball slide down and shoot up) but I'm looking for something cooler and potentially more precise. I read up on rail gun and don't know how to start it. I know the fundamental principles behind it and how it works but accord to the formula i found on wikipedia http://en.wikipedia.org/wiki/Railgun#Railgun_design I'm not even close to getting 1 newton. In order to do that I need like 100+ amps. I'm wondering how do people get 100 amp through the conductors. I know it has to do with capacitors and I've messed around with microelectronics before (arduino, small scale pic projects). Can someone fill me in on how to generate such force. I'm not looking for 10 N, 1 N is probably all I need.