Question : A body of mass 𝑚 is thrown upwards at an angle θ with the horizontal with velocity 𝑣. While rising up the velocity of the mass after 𝑡 second will be
(A) \sqrt{\left( v\cos \theta \right) ^{2}+\left( v\sin \right) ^{2}}
(B) \sqrt{\left( v\cos \theta -v\sin \theta \right) ^{2}-gt}
(C) \sqrt{v^{2}+g^{2}t^{2}-\left( 2v\sin \theta \right) gt}
(D) \sqrt{v^{2}+g^{2}t^{2}-\left( 2v\cos \theta \right) gt}
Answer : option (C)
Solution :
