An object is projected up the incline at the angle shown in figure with an initial velocity of 30 ms-1. The distance x up the incline at which the object lands is
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a
600 m
b
104 m
c
60 m
d
208 m
answer is C.
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Detailed Solution
x=2u2sin(α−β)cosαgcos2β where α=60∘ and β=30∘⇒ x=2(30)2sin30∘cos60∘gcos230∘⇒ x=(2)(900)(0.5)(0.5)(10)34=60 m