The table shows the potential energy and kinetic energy of a skier at two different positions on a hill. position and energy position (above ground) kinetic energy potential energy 100 meters 0 units 50,000 units 60 meters ? 30,000 units what is the kinetic energy of the skier at a height of 60 meters above ground? 20,000 units, because total energy remains unchanged 80,000 units, because total energy remains unchanged 20,000 units, because total energy of the skier decreases 80,000 units, because total energy of the skier decreases