# Mathematically proving "can't push on a rope"

• 03-28-2018, 09:00 PM
Rch2233
Mathematically proving "can't push on a rope"
I know intuitively that if i hold a roll of rope in front of me and have one end of the rope draped over a pulley above my head, that if I try to push the rope over the pulley by unspooling the rope, it won't work because I can't push on a rope, but what is the math behind it? Is there a speed that the pulley can spin that will draw up the rope?
• 03-28-2018, 09:10 PM
Kelly Bramble
• 05-02-2018, 04:28 AM
aakashsaxena291
The Reason behind the phenomena is friction, the Newtons law of gravity said that every object is experiencing the Gravitation Force, push and pull and other forces
• 05-02-2018, 10:41 AM
Hudson
I see this problem similar to Euler's column buckling problem with a low modulus and high slenderness ratio.
• 05-17-2018, 12:44 AM
Hudson
Fluids are pushed all of the time. Ever seen a fire hose?
• 05-17-2018, 08:51 AM
Kelly Bramble
I suppose that Column Theory or Euler's formula could be used.. Both ends would be treated as pinned?

[url]https://www.engineersedge.com/column_buckling/column_ideal.htm[/url]