Three identical steel wires, each 1.00 m long and
3.00 mm in diameter, are arranged as shown in the
picture. One end of each wire is secured to a ring of
negligible mass and the other end is secured to an
immovable wall so that the tension in the wires is just
enough to keep them straight (i.e. the initial tension is
approximately zero.) If the wires are cooled 80.0 C
, find
the distance the ring moves to the right and the final
tension in each wire. (Note: you can assume the angle
θ does not change when the ring moves.)
process should involve thermal expansion and stress
any expert pls help ty
http://i.imgur.com/HOx4KrZ.png
Three identical steel wires, each 1.00 m long and
3.00 mm in diameter, are arranged as shown in the
picture. One end of each wire is secured to a ring of
negligible mass and the other end is secured to an
immovable wall so that the tension in the wires is just
enough to keep them straight (i.e. the initial tension is
approximately zero.) If the wires are cooled 80.0 C
, find
the distance the ring moves to the right and the final
tension in each wire. (Note: you can assume the angle
θ does not change when the ring moves.)
process should involve thermal expansion and stress
any expert pls help ty
[img]http://i.imgur.com/HOx4KrZ.png[/img]
reenact the question in gmod
pretty sure you'll get an answer out of it
reenact the question in gmod
pretty sure you'll get an answer out of it
[img]http://i.imgur.com/b72IHc9.gif[/img]
[quote=frowny]42[/quote]
[img]http://localhostr.com/files/6kOdeuA/a234.jpg[/img]
Do your own homework.
Besides, I think you are missing some thermal properties of steel or something we need to know. Not that I ever took any thermo classes
Do your own homework.
Besides, I think you are missing some thermal properties of steel or something we need to know. Not that I ever took any thermo classes
why would I ask if I knew how to do it
constants arent needed to explain setup, I can do the gruntwork
everyone I know that has taken physics series before forgot how to do this already :<
why would I ask if I knew how to do it
constants arent needed to explain setup, I can do the gruntwork
everyone I know that has taken physics series before forgot how to do this already :<
process should involve thermal expansion and stress
I don't know shit about thermal expansion but I know a little about stress so I'll take a shot. Alright you'll need to find how much each wire contracts on it's own using yout handy thermal expansion formula(don't worry about the setup yet). So then you set that equal to PL/AE and solve for P obviously. This P is the tension that each wire exerts onto the ring. Therefore, you'll want to find the elongation of the first wire caused by the tension of wire 2 and 3 by using PL/AE where P = 2P cos15 . Add that to the delta you got before for wire 1 and if you get a positive number then it should work.
If that's all wrong then you'll know why I'm failing my mechanics course.
[quote]process should involve thermal expansion and stress[/quote]
I don't know shit about thermal expansion but I know a little about stress so I'll take a shot. Alright you'll need to find how much each wire contracts on it's own using yout handy thermal expansion formula(don't worry about the setup yet). So then you set that equal to PL/AE and solve for P obviously. This P is the tension that each wire exerts onto the ring. Therefore, you'll want to find the elongation of the first wire caused by the tension of wire 2 and 3 by using PL/AE where P = 2P cos15 . Add that to the delta you got before for wire 1 and if you get a positive number then it should work.
If that's all wrong then you'll know why I'm failing my mechanics course.
google/yahoo answers/cheggs that shit like every other person who has ever needed help with these kinds of problems.
google/yahoo answers/cheggs that shit like every other person who has ever needed help with these kinds of problems.
This is from a physics course? I did this shit in mechanics.
kace is accurate
This is from a physics course? I did this shit in mechanics.
kace is accurate
start setting up a FBD and writing all relevant equaltions/constants nerd
start setting up a FBD and writing all relevant equaltions/constants nerd
drop physics for internet search 101
drop physics for internet search 101
huffstart setting up a FBD and writing all relevant equaltions/constants nerd
Physics question? Start with the FBD, always helps.
[quote=huff]start setting up a FBD and writing all relevant equaltions/constants nerd[/quote]
Physics question? Start with the FBD, always helps.