Civil Engineering > GATE 2020 SET-1 > Structural Analysis
A rigid weightless platform PQRS shown in the figure (not drawn to the scale) can slide freely in the vertical direction. The platform is held in position by the weightless member OJ and four weightless, frictionless rollers. Points O and J are pin connections. A block of 90 kN rests on the platform as shown in the figure.
The magnitude of horizontal component of the reaction (in kN) at pin O, is
Correct : b
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