Register to reply 
Tension in Strings HELP thanks!very simple. 
Share this thread: 
#37
Feb1108, 06:37 PM

P: 300

oh okay i think i get what you are saying. thank you!
so what i basically have to do is this: 41.81*2*T= 156.96? is that what it means. i think? 


#38
Feb1108, 06:40 PM

P: 300

because the Tension in the x equals mass times gravity= 156.96
and the Tension in the y equals sin (theda) = 1.118 and the Tension in the x of the angle equals cos (theda) = 1/1.5 


#40
Feb1108, 06:58 PM

P: 300

48.187



#42
Feb1108, 07:03 PM

P: 300

so sin(48.187) + cos (48.187) = 0



#43
Feb1108, 07:03 PM

P: 300

wait no sorry it should be: sin(48.187) + cos (48.187) = mg



#44
Feb1108, 07:08 PM

P: 300

right?



#45
Feb1108, 07:11 PM

Mentor
P: 41,304

No. In post #36, I told you that:
Since you have two strings, you'll have to double it. Remember: F, the tension, is an unknown. Once you get the equilibrium equation written, you will solve for F. 


#46
Feb1108, 07:13 PM

P: 300

oooo now i get what you mean so its 2F(sin(theda))
so basically i got 2*(sin(48.187))F which = 1.491F 


#47
Feb1108, 07:14 PM

P: 300

but what i don't get is how you have 2 STRINGS because i am jus ttlaking about diagram a) so i hope u are not trying to figure out the tension in both the pictures.
or are you saying that since the big traingle can be divided into two triangles, there are two strings? 


#48
Feb1108, 07:26 PM

Mentor
P: 41,304




#49
Feb1108, 07:30 PM

P: 300

okay so now i totally get you.
thanks so now the next step i set 1.491F=mg? or 1.491F=.6667cos(48.187) 


#51
Feb1108, 07:32 PM

P: 815

PhysicsB, though this may seem unrelated to this thread, what book are you working from? I know what course you are taking (The same one as myself) but what book are you working from?



#52
Feb1108, 07:34 PM

P: 300

THANK YOU
ooo okay so lets see. (btw nice smiley face haha) okay so mg=156.96 so 1.491F=156.96 so F= 105.2963827Newtons? is that the correct answer?! THANK YOU 


#53
Feb1108, 07:35 PM

P: 300




#54
Feb1108, 07:36 PM

P: 815

Yes but do you use a book in class to learn from or to use as a reference?



Register to reply 
Related Discussions  
Tension of strings in an elevator  Introductory Physics Homework  1  
Tension in 2 strings  Introductory Physics Homework  5  
Tension, Work, Strings  Introductory Physics Homework  1  
Three pulling strings...need help with tension  Introductory Physics Homework  5 