Energy Skate Park Challenge-Morgan

http://screenr.com/1L3s

After completing the energy skate park challenge I concluded that when we say that energy is conserved we are saying that there is never Kinetic(KE) or Potential Energy(PE) that excell the Total Energy(TME). Just as it shows the bar graph on the side when there is less KE there is more PE to make TME. And if there is less PE there has to be more KE to also make TME. Then KE can also equal PE to make TME. That is what is meant when we say energy is conserved!

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.

Energy Skatepark Challenge

http://www.screenr.com/yYos

I did the first challenge for this extension. Which made me think "What does it mean when we say energy is conserved." Energy that is conserved can be explained multiple ways in this situation. The TME bar on the right side of the bar graph stays the same throughout the time the skater is on the track. On the curve graph, It shows that the KE and PE repeat itself throughout. They never go higher than the TME. Whenever the KE is low and PE is high, TME stays the same. Vice versa with TME being the same. But throughout the skaters ride, the TME never changes which shows that energy is conserved.