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Variation of Atmospheric Pressure with Altitude.

For the truss...

Question

For the truss shown in the figure, the force in the member QR is

A

\frac{P}{\sqrt{2}}

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B

\sqrt{2} P

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C

zero

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D

P

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Solution

The correct option is D P

Let force in member QR = F
Taking moment about T
$F \times L = P \times L$
$\Rightarrow$ F = P (Tension)

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