Elevator Design - Rack and Pinion Cascaded - 772

[Ether]

Originally Posted by akoscielski3

@Ether I still don't quiet understand what you mean with the 28lbs moving, I don't know if its just me miss understanding, or what?

In this post you said the assembly weighs 28 pounds.

In this post you said that the center of mass of this 28 pound assembly changes from 31" to 57".

That's a change of 26".

To change the center of mass of a 28 pound assembly from 31" to 57" requires 28*(26/12) foot-pounds of work. This is true regardless of whether you are lifting the entire 28 pound assembly 26", or lifting half the 28 pound assembly 52", or anything in-between.