Suppose you are on a rooftop and you throw a ball downward to the ground with an initial speed v0. You then throw an identical ball upward with the same initial speed v0. After rising, this ball also falls to the ground. When each ball strikes the ground, which ball has the larger speed
This is because they had the same energy at the same starting point, and because Potential energy is the same at ground level so is speed and KE at ground level. This is if air resistance is negligible
