A rope rests on two platforms that are both inclined at an angle \(\theta\) (which you are free to pick), as shown in Figure above. The rope has uniform mass density, and the coefficient of friction between it and the platforms is 1. The system has left-right symmetry.

What is the largest possible fraction of the rope that does not touch the platforms?

What angle \(\theta\) allows this maximum fraction?

## Comments

Sort by:

TopNewestYou may see the full solution here: https://www.physics.harvard.edu/uploads/files/undergrad/probweek/sol89.pdf – One Top · 1 year, 11 months ago

Log in to reply

22.5 – Mohnish Chakravarti · 2 years, 4 months ago

Log in to reply

answer is fraction:- 3 - 2^1.5 and angle is pi/8 i.e. 45/2 in degrees – Himanshu Meena · 2 years, 5 months ago

Log in to reply

Largest possible fraction should be 1/2 – Soumil Sahu · 2 years, 5 months ago

Log in to reply

cn u pls post the ans ? is it 45 – Arghadip Koner · 2 years, 5 months ago

Log in to reply

90 degrees – Mohamed Elsayed · 2 years, 5 months ago

Log in to reply

Log in to reply

– Beakal Tiliksew · 2 years, 7 months ago

If the latex is bothering u, simoly post it, we will understandLog in to reply

45 – Sachin Gupta · 2 years, 5 months ago

Log in to reply