You are given a uniformly charged spherical shell that has a radius R and carries positive charge q. In order to measure the electric field magnitude inside, you drill a small hole that removes 0.01% of the shell's material and insert a probe into the shell. What is the approximate magnitude of the electric field at the shell center? Express your answer in terms of the Coulomb's constant k and some or all of the variables q, R.

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

+15-35=-20

going in opposite directions