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sumatiedu
May 10, 2007, 10:37 AM
what should be the angle between 2 forces of magnitude 1 N and 13 N so that the resultant is 6*(5)^1/2 N. find the angle between the resultant and 1 N force.

asterisk_man
May 10, 2007, 11:16 AM
I think you should probably use law of cosines.
Law of cosines - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Law_of_cosines)

ebaines
May 10, 2007, 11:28 AM
Right - law of cosines will get you the angle between the 2 known forces. Then you could use the law of sines to find the angle between the resultant and the 1N force.