1. A Waste of Energy
By: William Drougton, William Gary, Christopher Little, and David Zeanah

5. Theoretical Speeds: v1= 3.28 ft/s v2= 3.84 ft/s v3= 4.10 ft/s
vball= 6.45 ft/s

6. Vavg=1.88 ft/s
Eloss= J

7. Vavg=0.784 ft/s
Eloss= J

8. Vavg=1.77 ft/s
Eloss= J

9. mcvc=mbvB
VB=0.295 ft/s

10. Vavg= 1.23 ft/s
Eloss=0.285 J

11. Summary
The reason for this loss of energy was due to the friction between the car’s tires
and the track as well as the ball and the screws. Air resistance may have also played a
significant role. The sound of the car rolling along and the ping of the ball against the
screws was another sign of lost energy.