Value of g

1. By Matthias, Ryan and Jimmy

2. Gravity pulls objects towards the center of the
earth. Therefore we have decided to drop
objects off of heights to showcase gravity.
Acceleration of a falling object:
2*height / (time)2

3. To find out the precise measurement of
gravity, we decided to drop objects off two
heights. The drops measured 5.3 and 3
meters. We dropped an eraser, a ball, and a
rock five times each and recorded the
results.
Requirements
- Eraser
- Ball
- Rock
- Height

5. Rock
Weight 367.41g
Time 1 0.69s
Time 2 0.79s
Time 3 0.7s
Time 4 0.88s
Time 5 0.79s
Height: 3 meters
Rock average time: 0.77 s

6. Eraser Ball
Weight 21.3g 79.45g
Time 1 0.97s 1.15s
Time 2 1.01s 1.01s
Time 3 0.86s 1.02s
Time 4 1.11s 1.09s
Time 5 1.03 0.99s
Height: 5.3 meters
Eraser average time: 0.996 s
Ball average time: 1.052 s

7. Acceleration of a falling object = 2*height / (time)2
Rock acceleration = 2*3m / (0.77s)2 = 10.12m/s2
Ball acceleration = 2*5.3m / (1.052) 2 =9.58 m/s2
Eraser acceleration = 2*5.3m / (0.996)2
= 10.69m/s2

8. When you drop an object, it is falling under
the sole influence of gravity
Factors: Air resistance, wind, reaction time,
force of the drop, exact distances.