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+--- Thread: Four coplanar forces act on a beam the forces Fb and Fc are vertical .the vector sum of the forces is zero? (/thread-163726.html)
Four coplanar forces act on a beam the forces Fb and Fc are vertical .the vector sum of the forces is zero? - 021 - 06-13-2014 06:56 AM
The magnitudes fb = 10kN fc = 5kN determine magnitudes of Fa and Fd
- 742 - 06-13-2014 07:00 AM
If coplanar, all 4 forces must be vertical.
Directions of fb and fc are unknown, so the problem can not be solved.
All we can say is Fa + Fd = -(fb + fc)