Four balls are dropped from a platform, 20 meters high. One ball is 5k, the other is 10kg, then 20kg, and 40kg. Which ball will experience the GREATEST change in kinetic energy, from platform to ground?

Answer 1

The potential energy loss and kinetic energy gain is M g H, where H is the platform height.

Since the elevation change is the same for all, the heaviest one has the most PE loss and KE gain.