Step-by-step explanation
Step 1
A)when you drop a coin from the top of a building it initially has gravitational potential energy (due to gravity, mass and height)
then in B)
B)gravitational energy is transformed into kinetic energy (due to motion), the energy only changes its form
finally at C)
C)the coin hits the ground, producing sound, some heat and the rest of the energy is transformed into mechanical waves in the air
I hope this helps you