The angle through which hinged plate will swing
1
\(\theta=sin^{-1}({W\over \rho~\times ~a ~\times ~V^2 })\)
2
\(\theta=cosec^{-1}({W\over\rho~\times~ a~ \times~ V^2})\)
3
\(\theta=sec^{-1}({W^2\over\rho~ \times~ a ~\times ~V^2})\)
4
\(\theta=tan^{-1}({W^3\over\rho ~\times ~a~ \times~ V^2})\)