(3) When an object falls freelytoward the ground, its potentialenergy decreases and kineticenergy increases. As theobject touches the ground, allits potential energy gets convertedinto kinetic energy. Asthe object hits the ground, allits kinetic energy gets convertedinto heat energy and soundenergy. It can also deform theground depending upon thenature of the ground and theamount of kinetic energy possessedby the object.