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# Physics Question

edited September 2007
Will you help me with #7 on page 10 from the link below?

edited September 2007
3 replies
Post edited by grantedin on

## Replies to: Physics Question

• 1052 replies16 threads Senior Member
I hope this method is correct:
There are 3 forces on the sign, gravity, A, and B. The sign will have to be in equilibrium so we want the the net force to be 0 and all the forces to balance out. Instead of using the 30 degree angle, instead use it's complement of 60. The y-component of the tension is just the weight. We know that Ty = T sin 60 so we can easily solve for the tension of A, 500sqrt3. Applying the Pythagorean theorem, we can solve for Tx, which is 433 N. This should also be the tension in B as well. So 433 N. If I'm wrong, hopefully someone can correct it.