View Full Version : [High School - Physics]
02-7-2008, 06:30 PM
ive doing some physics work and i need some help.
ive done all the hard part but i can't do the simplest thing and i need help solving T1
(T1*cos(x1))/cos(x2) = (mg - T1*sin(x1))/sin(x2)
i keep getting
2(cos(x2)mg)/(sin(x2)cos(x1)+cos(x2)sin(x1)) = T1
02-7-2008, 10:02 PM
Wrong section, and in the correct section, wrong title. I'll fix it up this time, but in the future, homework goes to the homework forum with the proper tags.
02-8-2008, 03:42 PM
hahaha high school... no no no
02-8-2008, 03:58 PM
You don'y have an age listed in any profile, didn't specify in your post, and don't look that old in your avatar. If you don't specify, we have to guess. How would you like the thread titled?
02-8-2008, 04:01 PM
Well, you may not be in high school, but you're having a problem with simple algebra, so surely you can understand the assumed level...
Collect all the T1s term on one side and then factor out T1. Then just divide from there. Recall that multiplication and division are associative, so you shouldn't have a problem isolating T1 and keeping the products of the two cosines and the two sines clean and separate from the other. Factoring out T1 just makes use of the distributive property.
You should be left with T1*(sine and cosine stuff) = mg
From there, just divide both sides by the stuff and you're good.
02-8-2008, 04:08 PM
Also, your answer is almost right and I can't tell where you're going wrong.
Try writing out every step if you aren't already.
Edit: You aren't doing x*y+x*z = 2x*(y+z), are you?
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