The cannon on a battleship can fire a shell a maximum distance of 32.0 km. (a) Calculate the initial velocity of the shell. (b) What maximum height does it reach? (At its highest,  the shell is above 60% of the atmosphere—but air resistance is not really negligible as assumed to make this problem easier.) (c) The ocean is not flat, because the Earth is curved. Assume that the radius of the Earth is 6.37×103km . How many meters lower will its surface be 32.0 km from the ship along a horizontal line parallel to the surface at the ship?  Does your answer imply that error introduced by the assumption of a flat Earth in projectile motion is significant here?

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Projectile Motion