1.

At what angle with the horizontal should a ball be thrown so that the range `R` is related to the time of flight as `R = 5 T^2` ? `(Take g = 10 ms6-2)`.A. `45^(@)`B. `15^(@)`C. `60^(@)`D. `90^(@)`

Answer» Correct Answer - A
`(2 u^(2) sin theta cos theta)/(g)=5 ((2u sin theta)/(g))^(2)`
`theta = 45^(@)`.


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