A square Lamina OABC of length 10 cm is pivoted at 'O'. Forces act at Lamina as shown in figure. If Lamina remains stationary, then the magnitude of F is :

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Since the lamina is equilibrium. ∴ F net ​ = 0& τ net ​ = 0 T o ​ = 10 ℓ − F ℓ ⇒ F = 10 N

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