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A tank cannon fires from an initial height of 8 feet with an initial velocity of...

A tank cannon fires from an initial height of 8 feet with an initial velocity of 2500 ft/s.
Is it possible to hit an object that is 20,000 ft away horizontally and is also 8 feet vertically?
If so what initial angle must the cannon be fired at? If not, then explain why not.
(Assume only forces acting on projectile is gravity and use g = 32 ft/s2)

Math   Calculus   
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A problem on projectile motion

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