... or prototype,if you have in mind an experiment,not reducing the friction,only( www.geocities.com/iacob_alex/Some_Drafts/text014.jpg ),but increasing the output/input ratio
,also.
In what manner?! Simply: enlarging the size ( www.geocities.com/iacob_alex/Some_Drafts/text045.jpg ).
You can think this as an "input-black box-output" configuration;
-black box= your model
-input = a constant value (gravity potential difference).
-output= a variable value(kinetic energy).
With the same input("arm difference..."),we can get an ever increasing output( "stored energy"...),if we have time,that is free fall velocity,that is diameter/size of the model.
All the Bests! / Alex
.....or imagine it bigger and bigger,as you can see at : www.geocities.com/iacob_alex/Some_Drafts/text045.jpg
The title "A small confusion?!" is reffering to something that,usually "disturbs" the thought process...
Here,the torque( due to a constant long arm-short arm difference) is becoming greater and greater,for increasing dimensions.
In other words:for the same input(we "pay"),we gain an ever expanded output.
All the Bests! / Alex
.....if your objective is to discard easy a non-working prototype.
The observation is simple : rolling friction << sliding friction.
The viewpoint is uncomplicated : test the static unbalance of your model,with the pivot supported on two horizontal planes.
You can face two occurences:
-to and fro/swinging motion
-rolling motion
Only the second circumstance (a well-advanced rotation ) can be an evidence ,that your model can be a solution.
All the Bests! / Alex