a) Potential energy is mgh where h = vertical distance. b) Kinetic energy is (1/2)mv^2 c) It has gained energy mgh where h is the vertical distance it fell (so far). Add that to the initial KE. d) It has gained energy mgh where h is the total vertical distance it fell. Add that to the initial KE. e) Work F * d = kinetic energy, because the force has to remove that kinetic energy from the rock. f) Exactly the same