Solving Tension on Cable Problem - Get the Answer Here

[fmorel90]

Hi
I have a homework problem I can't understand:
A 125-N sign is supported by a lightweight pole and cable as shown in the diagram. What is the tension in the cable?

the diagram resembles |>
the | is a wall, the top of > is the cable and the bottom is the pole, and the sign hangs from point at the right.
The pole makes a 40 degree with the wall, and the cable is 50 degrees, so where the pole and cable meet is a right angle.

can anyone give a hint on how to solve that?

 

[radou]

Writing down the equaions of equilibrium might help. Pardon me, must help.

 

[civil_dude]

Step 1: Draw a Picture, label everything you know. Make assumptions. cable is tension, pole is compression.

Step 2: Sum the forces in x and y
Step 3: Solve equations.