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Physics Lab 4

Part 1: Friction Parabola Track
3a. Kinetic energy is the highest when the skate board has reached its lowest point.
3b. Kinetic energy is the lowest when in the middle of the drop.
4a. Potential energy is the highest when the skate board has reached the highest point.
4b. Potential energy is lowest when in the middle of the drop.
5a. Total energy is the highest when potential energy is at its highest point.
6. The value of thermal energy is 0 only when potential energy is highest.

David Del Rio
Physics PH 2530
Lab 4 Energy
04/06/2015

Part 1: Loop Track
8. When a skateboarder moves, what happens to the kinetic and potential energy? Conservative (closed) or non-conservative (open) system?
- Kinetic energy rises as the skateboarder moves downward.
-potential energy rises as the skateboarder moves up.
- Non-Conservative
9. Where is the skateboarder at on the ramp when he reaches the maximum point of potential energy? 4546.93
11. m = 76./kg
The skateboarders mass = 76 kg
12a. calculated mass = 76 kg
12b. Actual mass 75 kg
12c. Comparison = .98%
13. When the coefficient is adjusted half way the kinetic energy decreases to 0 as to the potential energy decreases and finally stabilizes.
- This is a closed system.

Part 2: Friction Parabola Track
2a. kinetic energy is highest when the skaters’ board is at the lowest point
2b. in the middle of the drop the kinetic energy is highest.
3a. potential energy is the highest when the skaters’ board is at the highest
3b. in the middle of a drop the potential energy is the lowest
4a. when potential energy is at its highest point, total energy is the highest
4b. total energy is lowest when potential is low
5. The value of thermal energy is 0 Because no friction

Part 2: Loop Track
7. Describe what happens to the two kinds of energy as the skateboarder moves.
8a.…...

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