What is the angle between the first-order and second-order bright fringes for a yellow light with a wavelength of 605 nm, and a distance between two slits of 0.0550 mm?

your answer is, orbit around the nucleus

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