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

General physics (torque)

  • #1
A 200-N scaffold is held up by a wire at each end. The scaffold is 18m long. A 650-N box sits 3.0m from the left end. What is the temsion in each wire?

I have worked this problem several times but none of my answers are close to the choices I have on my paper. I tried it like this FT= -200(9) + 650(3) this is for the right side and FT=200(9)+ 15(650) for the left but it is not correct.

The choices for the answers are A)left wire=640N;right wire+210N B)left wire+195N; right wire=975N C) Left wire=295N;right wire=1000N D)left wire=520N; right wore=130N.

Mine do not come close to any of the answers. What have I done wrong. I greatly appreciate your help on this problem. Thank you
 

Answers and Replies

  • #2
Doc Al
Mentor
44,880
1,129
I tried it like this FT= -200(9) + 650(3) this is for the right side
Redo this. What are the torques about the left end? They must add to what? (Be sure to call clockwise torques negative and counterclockwise torques positive.) That should allow you to solve for the tension on the right end.
 

Related Threads for: General physics (torque)

  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
19K
  • Last Post
Replies
8
Views
1K
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
13
Views
5K
Replies
3
Views
1K
Top