Civil Engineering - Strength of Materials - Discussion


A joint of a frame is subjected to three tensile force P, Q and R equally inclined to each other. If P is 10 tonnes, the other forces will be

[A]. Q = 10 tonnes and R = zero
[B]. R + 10 tonnes and Q = zero
[C]. Q + R = 10 tonnes
[D]. Q - R = zero
[E]. Q and R each is equal to 10 tonnes.

Answer: Option E


No answer description available for this question.

Chiru said: (Nov 16, 2016)  

Given equal angles THERFORE P = Q = R.

Deep said: (Dec 3, 2018)  

Where is it mentioned of equal angles?

Swetha said: (Dec 9, 2018)  
If Q=R means Q-R=0, so why not option D?

Ayesha said: (Aug 9, 2019)  
Equally inclined to each other means the angle between PQR is 180 degree. How the sine rule will work? sin180= zero. And if we use that its not defined.

Can anyone explain?

Muhammad Usman said: (Feb 17, 2020)  
The direction is not given so we can not say that Q-R=0 so the given answer is correct.

Fgc said: (Mar 18, 2020)  
Angle between them is 120 because 360/3 = 120.

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