I just had a test Friday and I spent 30 minutes on this so-called "Easy" problem. The resultant force is "-2J + 5K" and there are 3 forces that compose this resultant force. The Magnitude of F2 is 5kN The Magnitude of F1 is 3kN F1 has a angle of "0" to the Y axis The 3 forces are all acting on a 3D vector plane, but no vector has a value for "I". So none are moving in the x direction. Given the image below (Forgive the crude drawing): Find: The Magnitude of F3 The Angle that F3 is acting apon And the Magnitude of the Resultant force. Can this be done given the information in my drawing? I didn't leave anything off, this is what we were given and I even asked my instructor if we were missing information. I couldn't solve this one, and many in my class had problem just as I did. This is a second year college level course. If you can help me out, thanks, I really would love any help I could get.