A gun has muzzle speed 156 m/s. Find two angles of elevation that can be used to hit a target 750 m away. (Enter your answers as a comma-separated list. Round your answers to one decimal place. Use g ≈ 9.8 m/s2.) α = °

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft