A bomb is dropped (initial speed zero) from a helicopter hovering 800 meters above the ground. A projectile is fired from a gun located on the ground 800 meters west of the point directly beneath the helicopter. The projectile is supposed to hit the bomb at a height of exactly 400 meters above the ground. If the projectile is fired at the same instant the bomb is dropped, what should be its initial velocity and angle of elevation

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?