Hello all, I'm looking for a sim that will allow a falling weight to control a system of gears (such as for a clock).  The weight would have to be variable, along with the number of gears and their teeth.  Also, I would need a readout for rpm of each gear, and the rate of fall for the weight.  The distance of the fall should be variable.  I'm trying to build a system which will show the relationship between gravitational potential energy and electrical energy (see if you can get the right gear ratio to run an ac 60hz generator using only a falling weight).  Thanks,