Need HELP

• Oct 7th 2013, 02:35 PM
TwelfthCoin
Need HELP
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
• Oct 7th 2013, 04:15 PM
topsquark
Re: Need HELP
Quote:

Originally Posted by TwelfthCoin
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

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, 04:50 PM
TwelfthCoin
Re: Need HELP
How would I start that the last thing I leqrned was sine cosine tangent cotangent secant and cosecant.

Ps thanks for the quick reply
• Oct 7th 2013, 05:28 PM
topsquark
Re: Need HELP
Quote:

Originally Posted by TwelfthCoin
How would I start that the last thing I leqrned was sine cosine tangent cotangent secant and cosecant.

Ps thanks for the quick reply

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