That is a very good demonstration Ian and very complex to analyse because of the spring properties, the lever mass and the two different masses and the positions on the lever. All three of Newton's laws of motion rely on inertia and simply stated as inertia is the resistance to change of motion. Thanks for the video.
great demonstration. One way to put what you've shown is that while the force at the other end of the stick is the same, the smaller mass makes the force (to slow down and stretch the thing) slower. The human using a lever is fooled maybe, and "doesn't see a difference" but the universe does.
Only when you accelerate it! That's what he used to complain about,he fails to recognise that by applying any force by hand or otherwise to the lever there has to be an acceleration!
I'm currently doing the same type of experiment once again. Getting the same results as you ofcourse. No matter what type of lever, what type of weights, what shape they have or whatever, the 1mass twice the distance from the fulcrum ALWAYS oscillates slower. Nature must be broken....
