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A two-member truss $PQR$ is supporting a load $W$. The axial forces in members $PQ$ and $QR$ are respectively

  1. $2W$ tensile and $\sqrt{3}W$ compressive
  2. $\sqrt{3}W$ tensile and $2W$ compressive
  3. $\sqrt{3}W$ compressive and $2W$ tensile
  4. $2W$ compressive and $\sqrt{3}W$ tensile
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