i have been out of classes for two weeks because i had knee surgery. i have a test coming up in a couple of days. and i am stuck on one problem that i cant figure out to save my life. if you can show me how to solve it that would be awesome

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- Oct 7th 2013, 03:35 PM #1

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- Oct 7th 2013, 05:15 PM #2
## Re: Need HELP

If it is stationary then all the forces add up to 0 N. So set up the usual x,y coordinate system and break the forces down into components. You will have two equations, one from the x and one from the y. Let's hope that they work out to the same angle since the problem is overconstrained.

-Dan

- Oct 7th 2013, 05:50 PM #3

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- Oct 7th 2013, 06:28 PM #4
## Re: Need HELP

Let's talk about the force at an angle. You have a 250 N force acting up and to the right. Sketch that force as a right triangle. You've got a leg to the right, a leg upward, and a hypotenuse up and to the right. What I mean by "components" is calculating the size of the legs. So the leg to the right has a magnitude of 250 * cos( angle ). What about the upward leg?

-Dan