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A hunter in a valley is trying to shoot a deer on a hill.The distance of the deer along his line of sight is 10√181 m & the height of hill is 90 m His gun has muzzle velocity of 100 m/s .Minimum how many meters above the deer should he aim his rifle in order to hit it ?

A hunter in a valley is trying to shoot a deer on a hill.The distance of the deer along his line of sight is 10√181 m & the height of hill is 90 m His gun has muzzle velocity of 100 m/s .Minimum how many meters above the deer should he aim his rifle in order to hit it ?
 

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago
Dear Utkarsh
 
 
Apply second law of eqn. in y-  direcn. .i.e.
90 = 100*t – 0.5*g*t^2
solving we get t=1 and t= 19 s but t= 1 is perceived.
In this 1 s he would miss the deer.
So to hit it, he needs extra => 0.5*g*1^1 = 5 meter above the deer.
 
 
Hope it helps
 
Regards
Arun

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