Below is a diagram of a weight on a spring. when the weight is pulled down and then released the spring compresses and expands. each position indicates a different point in time.
a. in all four positions mechanical energy is 0 j
b. the elastic potential energy of the spring at position 2 is converted to kinetic energy
c. the chemical potential energy of the spring is greatest at position 4
d. in all four positions, the gravitational potential energy of the spring is the same

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

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.