Activity 3: Energy Lab
Ball #1:
m = 1.2 kg; Initial height = 5.0 m
Total Energy at initial height = 58.8J
| Trial # | Paused Height (m) | Velocity (m/s) | Gravitational
Energy (Eg=mgh) (J) |
Kinetic Energy
(Ek= ½ mv2) (J) |
Total Energy
(ET = Eg + Ek) |
| 1
|
4.8 m | 3.112 m/s | 56.448J | 5.8107264J | 62.2587264J |
| 2
|
3.9 m | 3.721 m/s | 45.864J | 8.3075046J | 54.1715046J |
| 3
|
2.7 m | 6.926 m/s | 31.752J | 28.7816856J | 60.5336856J |
| 4
|
1.7 m | 8.128 m/s | 19.992J | 39.6386304J | 59.6306304J |
| 5
|
0.4 m | 9.605 m/s | 4.704J | 55.353615J | 60.057615J |
Ball #2:
m = 2.2 kg; Initial height = 5.0 m
Total Energy at initial height = 107.8J
| Trial # | Paused Height (m) | Velocity (m/s) | Gravitational
Energy (Eg=mgh) (J) |
Kinetic Energy
(Ek= ½ mv2) (J) |
Total Energy
(ET = Eg + Ek) |
| 1
|
4.7 m | 3.393 m/s | 101.332J | 12.6636939J | 113.9956939J |
| 2
|
3.3 m | 6.197 m/s | 71.148J | 42.2430899J | 113.3910899J |
| 3
|
2.5 m | 7.152 m/s | 53.9J | 56.2662144J | 110.1662144J |
| 4
|
1.3 m | 8.583 m/s | 28.028J | 81.0346779J | 109.0626779J |
| 5
|
0.7 m | 8.998 m/s | 15.092J | 89.0604044J | 104.1524044J |
Ball #3:
m = 3.2 kg; Initial height = 5.0 m
Total Energy at initial height = 156.8J
| Trial # | Paused Height (m) | Velocity (m/s) | Gravitational
Energy (Eg=mgh) (J) |
Kinetic Energy
(Ek= ½ mv2) (J) |
Total Energy
(ET = Eg + Ek) |
| 1
|
4.5 m | 3.921 m/s | 141.12J | 24.5987856J | 165.7187856J |
| 2
|
3.6 m | 5.731 m/s | 112.896J | 52.5509776J | 165.4469776J |
| 3
|
2.4 m | 7.555 m/s | 75.264J | 91.32484J | 166.58884J |
| 4
|
1.4 m | 8.551 m/s | 43.904J | 116.9913616J | 160.8953616J |
| 5
|
0.4 m | 9.547 m/s | 12.544J | 145.8323344J | 158.3763344J |
