folconor: folconor (5:27:27 PM): yo
folconor (5:27:35 PM): how do i find I in 5
notfriedy (5:27:55 PM): it's just MR^2 <-- M of the disk + 1/2 MR^2 <-- M from the rod
notfriedy (5:28:11 PM): that is equivalent to 2(1/2MR^2)+1/2MR^2
folconor (5:28:15 PM): yeah
folconor (5:28:21 PM): why isn't is 1/12
folconor (5:28:22 PM): ?
folconor (5:28:31 PM): oh the rod is acting like a cylinder
notfriedy (5:28:40 PM): yeah
folconor (5:28:43 PM): wow
folconor (5:28:47 PM): how did i not see that?
notfriedy (5:28:57 PM): idk
folconor (5:32:06 PM): and the first R is the radius of the disk
folconor (5:32:12 PM): and the second R is the radius of the rod?
notfriedy (5:32:32 PM): yes
folconor (5:36:02 PM): ok
folconor (5:36:22 PM): i'm gonna need more of a walk through sry
notfriedy (5:36:33 PM): just do Fr = I alpha
notfriedy (5:36:43 PM): so F = I omega / R^2
notfriedy (5:36:48 PM): no
notfriedy (5:36:48 PM): i mean
folconor (5:36:54 PM): F*r = (MR^2 + mr^2)*al
notfriedy (5:37:01 PM): F = I * a / R^2
folconor (5:37:13 PM): F = (MR^2 + mr^2)*a/r^2
folconor (5:37:15 PM): which r
notfriedy (5:37:19 PM): the rod
folconor (5:37:20 PM): little r or big R
folconor (5:37:20 PM): k
folconor (5:37:32 PM): and then mgsin - F = ma
notfriedy (5:37:36 PM): yes
folconor (5:38:05 PM): mgsin = a(m+I/r^2)
folconor (5:38:10 PM): and m is the two disks + rod
folconor (5:38:11 PM): right?
notfriedy (5:38:24 PM): yes
folconor (5:39:40 PM): w00t
folconor (5:41:05 PM): translational energy is moving or total?
notfriedy (5:41:13 PM): moving
notfriedy (5:41:18 PM): total = translational + rotational
folconor (5:41:22 PM): kk