Solving Tension in a Cable Homework

  • Thread starter Thread starter datphysics
  • Start date Start date
  • Tags Tags
    Cable Tension
AI Thread Summary
The discussion focuses on finding the tension 'T' in a cable problem involving equilibrium conditions. The user has attempted to set up equations based on torque and forces but is struggling with the overall equilibrium conditions. They have identified the equation TLsinθ - w(l/2cosθ) - w(Lcosθ) = 0 for one part of the problem but are unsure about the other equilibrium conditions. Assistance is requested for completing the equations for both horizontal and vertical force components. The conversation emphasizes the importance of labeling forces and applying the relevant equilibrium equations to solve for tension.
datphysics
Messages
4
Reaction score
0

Homework Statement


Im having trouble understanding how to find the tension 'T' and pretty much answering the question on the .jpg file i have attached


Homework Equations


ƩFx=0, ƩFy=0, τ=r x F


The Attempt at a Solution


For question 17 i have:
TLsinθ - w(l/2cosθ)-w(Lcosθ)= 0 (*because net sum of torques =0*)

And for question 18 i have no attempts at the question haha.

Help would be much appreciated!
 

Attachments

  • question 17,18..jpg
    question 17,18..jpg
    33.7 KB · Views: 405
Physics news on Phys.org
datphysics said:
For question 17 i have:
TLsinθ - w(l/2cosθ)-w(Lcosθ)= 0 (*because net sum of torques =0*)
Good. That will give you the tension. What about the other conditions for equilibrium?
 
Umm i have no idea what are the other conditions of an equilibrium are..
 
datphysics said:
Umm i have no idea what are the other conditions of an equilibrium are..
You posted them under "Relevant Equations". :smile:
 
Sorry for the delayed reply but i have completed number 18 but have not completed 17 (been doing other topics, anyways back this topic).

The next part should be: (But I am not sure how haha)
3.TLsin60-3/2WLcos60 = 0
 
Last edited:
datphysics said:
Sorry for the delayed reply but i have completed number 18 but have not completed 17 (been doing other topics, anyways back this topic).

The next part should be: (But I am not sure how haha)
3.TLsin60-3/2WLcos60 = 0
Show your equations for ƩFx = 0 and ƩFy = 0.

Hint: Label the force components exerted by the pivot as Px & Py. You'll solve for those components, of course.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Tension and net torque in a cable
Replies
10
Views
5K
Find Tension in Cables for 13 kg & 4 kg Signs
Replies
10
Views
3K
Find the tension in the cable and reactive forces at ground
Replies
4
Views
5K
Calculating Tension and Net Force in Suspended Cable System
Replies
3
Views
3K
Static equilibrium: Find the tension in a support cable
Replies
6
Views
3K
Torque and Rotational Equilibrium with a slanted Rod/Cable
Replies
7
Views
3K
Tension on cable CD when moment on A is Zero.
Replies
1
Views
807
Cable car with 2 cable arrangement
Replies
1
Views
7K
Work done by the tension on a cable
Replies
13
Views
10K
Finding Static Equilibrium: Solving a Rod and Cable System
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top