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A plane truss $\text{PQRS}$ ($\text{PQ=RS}$, and $\angle PQR=90^{\circ}$) is shown in the figure.

The forces in the members $\text{PR}$ and $\text{RS}$, respectively, are _____________________

  1. $F\sqrt{2}$ (tensile) and $\text{F}$ (tensile)
  2. $F\sqrt{2}$ (tensile) and $\text{F}$ (compressive)
  3. $\text{F}$ (compressive) and $F\sqrt{2}$ (compressive)
  4. $\text{F}$ (tensile) and $F\sqrt{2}$ (tensile)
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