A particle at a height h from the ground is projected with an angle of 30 from the horizontal strikes the ground making an angle of 45 with horizontal . It is again projected from the same point bit now with an of 60 with horizontal find the angle it makes with horizontal when it strikes the ground. (A) tan inverse 4 (B) tan inverse 5 (C) tan inverse root 5 (D) tan inverse root 3

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Eshan · Answer

hi bye · Answer

U sing v = 2 u 2gh  v = 22 u sin 2gh  (vertical comp. when striking) Now tan 45° = 1 u cos  = 22 u sin 2gh  u 2 cos 2  = u 2 sin 2  + 2gh ......(1) u 2 31 44     = 2gh u 2 = 4gh u = 2 gh ; tan  = T H v v = 3 4gh. 2gh 4 1 2 gh 2   = 5gh gh = 5 i do not knoew the ans

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