Do you think the Skater will make it over the first hump Do you think the Skater will make it over the first hump? (No friction on the track) No, because his potential energy will be converted to thermal energy No, because he doesn’t have enough potential energy Yes, because all of his potential energy will be converted to kinetic energy Yes, because some of his energy will be potential and some kinetic

2. Do you think the Skater will make it over the first hump 2. Do you think the Skater will make it over the first hump? (with track friction) No, because his potential energy will be converted to thermal energy No, because he doesn’t have enough potential energy Yes, because all of his potential energy will be converted to kinetic energy Yes, because some of his energy will be potential and some kinetic

3. Do you think the Skater will make it over the first hump 3. Do you think the Skater will make it over the first hump? (No friction on the track) No, because his potential energy will be converted to thermal energy No, because he doesn’t have enough potential energy Yes, because all of his potential energy will be converted to kinetic energy Yes, because some of his energy will be potential and some kinetic

4. Do you think the Skater will make it over the first hump 4. Do you think the Skater will make it over the first hump? (with track friction) No, because his potential energy will be converted to thermal energy Yes, if not too much energy is converted to thermal Yes, because all of his potential energy will be converted to kinetic energy Yes, because some of his energy will be potential and some kinetic

5. If in the next moment, the KE piece of the pie gets larger, then The Skater is going up hill (left) The Skater is going down hill (right) There is no way to tell

6. In the next moment, the KE piece of the pie gets larger, then The PE part stays the same The PE part gets larger too The PE part gets smaller There is no way to tell

7. In the next moment, the KE piece of the pie gets larger, then The Skater will be going faster The Skater will be going slower There is no way to tell

8. The dotted line on the chart shows the energy of the Skater, where could she be on the track?

9. The bar graph shows the energy of the Skater, where could she be on the track?

10. The pie graph shows the energy of the Skater, where could she be on the track? Explain your answer… A B C D E KE PE

11. If the ball is at point 4, which chart could represent the ball’s energy? KE PE A. B. C. D. 2 1 3 4

12. If a heavier ball is at point 4, how would the pie chart change? KE No changes The pie would be larger The PE part would be larger The KE part would be larger PE 2 1 3 4

13. As the ball rolls from point 4, the KE bar gets taller 13. As the ball rolls from point 4, the KE bar gets taller. Which way is the ball rolling? At 4 Next step 2 1 3 4 Up Down not enough info

14. The Energy chart of a boy skating looks like this How would you describe his speed? He is at his maximum speed He is stopped He is going his average speed He is going slow He is going fast

15. The Energy chart of a boy skating looks like this How would you describe his speed? He is at his maximum speed He is stopped He is going his average speed He is going slow He is going fast

16. Select a letter for each: stopped, slow and fast B A

Energy vs Position 17. Sketch this energy position graph. Label where the 5 spots, A-E, could be PE KE He is going his maximum speed He is stopped He is going his average speed He is going slow He is going fast