Mon September 17, 2012 By: Meet

a plane flying horizontally at a height of 1500 m with a velocity of 200 m/s passes directly overhead an anticraft airgun.then the angle with the horizontal at which the gun should be fired for the shell with a muzzle velocity of 400 m/s to hit the plane

Expert Reply
Tue November 20, 2012
say after t sec the bullet strikes the plane.
so the distance covered by plane=horizontal distance covered by the bullet
200 t=(400 cos ?)t
?=60 degrees with horizontal
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