A gunner wants to fire at a target at a horizontal distance of 12500 m from his position.
(a) If his gun fires with a muzzle speed of 700 m/s and if g = 9.81 m/s^2, what is the correct elevation angle? Pretend that there is no air resistance.
(b) If the gunner mistakenly assumes g = 9.80 m/s^2, by how many meters will he miss the target?