Energy Skate Park Answer Sheet

Energy Skate Park Answer Sheet
Part I (no friction):

Part II (friction):

Part III:
1. Assuming there is no friction, how can you predict the height of the skater to the other side. Start the skater at different positions and see how high he goes on the other side.
Rule for predicting height:_______________________________________________________________________
Explain your rule in terms of energy: ______________________________________________________________
____________________________________________________________________________________________
2. Add friction, as you did in part II. Start the skater at the beginning of the track and let him go. How does his motion differ from #1? ________________________________________________________________________
Explain your answer in terms of energy: ___________________________________________________________
____________________________________________________________________________________________
3. Change the friction slider to “none.” Drag the skater so that he is positioned a couple of meters above the ramp at the starting position. Then drop him onto the ramp.
Describe what you observe: _____________________________________________________________________
Explain why this happened: _____________________________________________________________________
4. Then click on “edit skater”, scroll down so that the “mass” slider appears. Change the mass to 200 kg. How does changing the mass of Ollie affect his velocity? You may want change his mass to 1 kg and see if you notice any difference. __________________________________________________________________________________
5. On the control panel change the location to Jupiter and click on the “energy pie chart” as well.
a. How does the gravitational force per kilogram compare to 9.8 N/kg on the earth? ________________________________________________________________________________________
b. How does your