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An antitank gun is located on the edge of a plateau that is 60 m above...

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Physics

An antitank gun is located on the edge of a plateau that is 60 mabove the surrounding plain. The gun crew sights an enemy tankstationary on the plain at a horizontal distance of 2.2 km from thegun. At the same moment, the tank crew sees the gun and starts tomove directly away from it with an acceleration of 0.90m/s2. If the antitank gun fires a shell with a muzzlespeed of 240 m/s at an elevation of 10deg. above the horizontal,how long should the gun crew wait before firing if they are to hitthe tank.

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