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Equation of trajector of ground to groun...

Equation of trajector of ground to ground projectile is `y=2x-9x^(2)`. Then the angle of projection with horizontal and speed of projection is : `(g=10m//s^(2))`

A

`theta_(0)=sin^(-1)((1)/(sqrt(5)))` and `v_(0)=(5)/(3)ms^(-1)`

B

`theta_(0)=cos^(-1)((2)/(sqrt(5)))` and `v_(0)=(3)/(5)ms^(-1)`

C

`theta_(0)=cos^(-1)((1)/(sqrt(5)))` and `v_(0)=(5)/(3)ms^(-1)`

D

`theta_(0)=sin^(-1)((2)/(sqrt(5)))` and `v_(0)=(3)/(5)ms^(-1)`

Text Solution

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The correct Answer is:
B
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