eccentrically1 ask?
Why did the ropes go through two pulleys to raise the load? One pulley would have worked. Two were necessary because of the relative weakness of the wheel? Or was it more pulleys?
...the easy answer is "vector pulling" also referred to or applied as " Z" dragging..
essentially it is to ropes and pulleys, the same as lever arms and loads.
richard
edit to add
Gregory ask
I am interested for a long time how many percentage are those (compared to the forum) who think gravity cannot be the prime mover.
richard ask
What Gravity?...here is the empirical "Gravity is theory only"
if we consider science and math "
First Order Logic" or
Predicated Order Logic" Gravity most certainly does not exist..this is empircal.
sounds crazy or perhaps a ( comes on a little strong) apologia to the non existance of gravity. so let us then, reason back before 1879. I.e.
Gottlob Frege in his
Begriffschrift.(First Order of Logic)
let us consider gravity, scientifically, once again, before First Order Logic..
..Syllogism...(Aristotle) also Newton, Euler, Huygens, Wolf Liebniz.etc etc. etc.
Where in
Syllogism science will deduce from other evidence...Gravity, is never deduced, it is only speculated on as a force to explain what lacks explanation...No disrespect to the Brilliant aforementioned, because Relativity, and specificlly Einstien fared no better..
darn gotta go bye
richard
where man meets science and god meets man never the twain shall meet...till god and man and science sit at gods great judgement seat..a tribute to Bessler....kipling I think