• Support PF! Buy your school textbooks, materials and every day products Here!

Simple Static Problem

  • Thread starter Sam Fred
  • Start date
  • #1
15
0

Homework Statement



Q) A transmission cable AB exerts a 3000N force on the pole in the direction of the tangent to the cable at A (see Fig. 1). Determine the required tension T in the wire AB if the resultant of the two forces at A is to be vertical (1 point). Find the magnitude R of the resultant (2 points).
Untitled.jpg

Homework Equations


ƩF = 0


The Attempt at a Solution


image.jpg

I want to understand what does it mean that the 3000 N force on the pole in the direction of the tangent cable at A.
 
Last edited:

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
25,832
249
Hi Sam Fred! :smile:
I want to understand what does it mean that the 3000 N force on the pole in the direction of the tangent cable at A.
I found that very puzzling until I looked at the diagram …

a cable will normally be slightly curved, as shown in the diagram

the tension will still be along the cable, so it will be in the direction of the cable at the point of attachment to the pole

ie it will be in the direction of the tangent to the cable where it meets the pole …

as you can see in the diagram, that tangent is marked as being at -20°, while the cable itself curves gracefully away from the tangent as it goes left :wink:
 

Related Threads on Simple Static Problem

  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
2
Views
6K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
9
Views
3K
  • Last Post
Replies
13
Views
1K
  • Last Post
Replies
4
Views
2K
Replies
5
Views
2K
Top