Energy Skate Park Challenge

After compleating all the challenges we concluded that when it says conserved energy it means that the object or person isn't using all of it's energy it's just using some of it. For the third challenge we concluded that you can predict the velocity of the skater by using a few equations, but first you have to find out the masses the height then use those numbers and the gravity in an equation. For the second challenge we found out that friction greatly affects conservation of energy, because when there was no friction the skater had no problem going up and then coming back down without using all of it's energy, but when we added friction we had use all of the skaters energy to get up the track.