First slide
Projection Under uniform Acceleration

A projectile can have same range R for two angles of projection. It t1 and t2 are the times of flight in the two cases, then what is the product of two times of flight?


The horizontal range is the same for the angles of projection 90θ
t1=2usinθg,t2=2usin90θg=2ucosθg t1t2=2usinθg×2ucosθg=2gu2sin2θg=2gR  where R=u2sin2θ   Hencet1t2R        (as R isconstant

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