Measuring acceleration of gravity in Kielce.
Our school is called John Śniadecki High School.
Table of measurement results
|
Lp
|
Length of
string,l(m)
|
number of
oscillations n
|
Time taken for n-oscillation, t (s)
|
Period of
oscillation T (s)
|
|
t 1
|
t 2
|
t 3
|
Average
|
|
1
|
0.98
|
10
|
20,6
|
19,7
|
20,6
|
20,3
|
2,03
|
|
2
|
0.98
|
30
|
59,1
|
58,2
|
65,5
|
60,9
|
2,03
|
|
3
|
0.98
|
50
|
100,1
|
96,8
|
98,9
|
98,6
|
1,97
|
|
4
|
0.98
|
70
|
139,0
|
134,8
|
138,1
|
137,3
|
1,96
|
|
5
|
0.98
|
100
|
197,8
|
189,1
|
200,4
|
195,8
|
1,96
|
Record measurement uncertainties:
Conclusion
Value of acceleration gravity for Kielce is 9,81 m/s^2 According to our calculation it is 9,76m/s^2. The average of measurement error is 0,19 m/s^2. Errors can result from influence of air resistance, inaccurate mathematical approximations or our own mistakes during the time measurements. Despite that our result is quite satisfying.