1. The problem statement, all variables and given/known data https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/spring09/homework/10/three_cylinders/6.gif [Broken] Three identical, solid, uniform density cylinders, each of mass 17 kg and radius 1.67 m, are mounted on frictionless axles that are attached to brackets of negligible mass. A string connects the brackets of cylinders #1 and #3 and passes without slipping over cylinder #2, whose bracket is attached to the ledge. Cylinder #1 rolls without slipping across the rough ledge as cylinder #3 falls downward. This system is released from rest from the position shown -- with cylinder #3 at a height of 4.7 m above the ground. Q) How fast is cylinder #3 moving just before it hits the ground? (v=?) 2. Relevant equations 3. The attempt at a solution For Q1, i tried to use Newton's second law. While doing it, a= mg-T from #3 RT = I*[tex]\alpha[/tex] or RT = 0.5*m*R^2*[tex]\alpha[/tex] And i used alpha as (a/R) Then i got T=0.5Ma When substituting this into the first equation, i got 'a' as 17.55 which seems to be wrong.. I think i did something wrong in replacing alpha as (a/R)... But i can't find it exactly... Please Could someone help me out here?