Which is an example of the conversion of gravitational potential energy into kinetic energy?

When a ball is dropped from some height from rest then while its motion under gravity its initial gravitational potential energy converts into kinetic energy

Explanation:

When ball is placed at some height "h" above the floor at rest then initial gravitational potential energy is given as

here we know

m = mass of the ball

g = acceleration due to gravity

h = height of the ball

now when ball is dropped from this height then its initial potential energy will convert into kinetic energy.

so speed of ball at some instant of time is given as

so here in this case gravitational potential energy will convert into kinetic energy of ball

we need answer choices

it doesn't. it was imagined up in the middle ages.