Formal Write up

Word document

Introduction

What is acceleration due to gravity?

• Mass independence

• Height dependence

• Show that g=9.8m/s^2 using G= 6.67 x10^-11 Formula: Fg=GM/r^2

There are companies out there that are interested in determining “g” accurately? What techniques do they use? (Make a research) These companies are researching g in the 3rd decimal point.

Experimental:

1) Equipment-list, picture specification

2) Procedure

Results and Discussion

PART A: Position vs time graph (plug the information of the graph in the excel and place the graph in the word document-comment on shape of graph and whether it is consistent with kinematic equation y-yo=Voyt+1/2ayt^2. In excel do 2nd order polynomial trend-line fit and find acceleration due to gravity from trend line equation). EACH TABLE NEEDS TO HAVE A GRAPH

Table 1

Time P(cm)

0 0

1/40s 1.1

2/40s 2.9

3/40s 5.8

4/40s 8.1

5/40s 11.8

6/40s 16.7

7/40s 19.9

8/40s 25

9/40s 30.4

10/40s 36.5

11/40s 43.9

12/40s 50.7

13/40s 58.6

14/40s 66.6

15/40s 75.3

16/40s 84.6

17/40s 94.5

18/40s 104.4

19/40s 116

Table 2 acceleration(cm/s^2) from trend line eq. over %error (accept value 980cm/s^2)

PART B: Velocity over time

Table 3

Graph 2 on excel velocity over time. Comment on shape of graph and is it consistent with kinematic equation V=Vo+at ? Do a linear trend-line fit to determine acceleration from trend-line equation.

Table 4

Conclusion: Comment on the obtained acceleration values and explain why it might be different.