Given F1=3î+4ĵ and F2=2î-ĵ. A third force F3 is applied to keep the body in equilibrium. F3 must be:

  • 5î + 3ĵ
  • -5î – 3ĵ
  • -3î – 5ĵ
  • 3î + 5ĵ
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