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2015-11-12T00:23:34+05:30

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Option (c)

Angle of project with horizontal = Ф

Range = R = u² sin 2Ф / g
MAximum Height = H = u² Sin² Ф / 2 g

So    R = 2 H
    =>  2 SinФ Cos Ф = 2 * 1/2  sin² Ф
    =>   tan Ф = 2 / 1
    =>   sin Ф = 2/√(1²+2²) = 2 /√5

maximum height = H = 2 u² / (5 g)


1 5 1
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