# Lap Report Spark Timer

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• Topic: General relativity, Gravitation
• Pages : 2 (389 words )
• Download(s) : 194
• Published : April 5, 2011

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Carly Beardshear
Mr. Volle
September 6, 2010
2nd hour
Lab Report
I. Purpose
The purpose of this lab is to investigate gravitational force on acceleration. II. Materials
1. Spark Paper
2. Spark Time
3. 350 Gram Weight
4. Ticker Tape
III. Procedure
1. Measure 1 meter of spark paper.
2. Thread paper through spark timer and set timer to 60 Hz.
3. Tape 350 g weight to spark paper.
4. Turn on spark timer.
5. Drop weight from height of a desk (34 in).
6. Record the data.
7. Analyze and graph.
IV. Results
TimeDisplacementVelocity
1/603 mm180mm/s
2/604 mm
3/602 mm
4/605 mm
5/607 mm420 mm/s
6/6011 mm
7/60 13 mm
8/6017 mm
9/6019 mm1140 mm/s
10/6022 mm
11/6025 mm
12/6028 mm
13/6030 mm1800 mm/s
14/6034 mm
15/6035 mm
16/6039 mm
17/6042 mm2520 mm/s
18/6044 mm
19/6046 mm
20/6050 mm
21/6053 mm3180 mm/s
22/6055 mm
23/6059 mm
24/6060 mm
25/6064 mm
26/6066 mm
27/6068 mm4080 mm/s
V. Analysis
V=ΔX/ ΔT
#1 1. V=3/(1/60) = 180 mm/s
#52. V=7/(1/60) = 420 mm/s
#93. V=19/(1/60) = 1140 mm/s
#134. V=30/(1/60) = 1800 mm/s
#175. V=42/(1/60) = 2520 mm/s
#216. V=53/(1/60) = 3180 mm/s
#27 7. V=68/(1/60) = 4080 mm/s
Math: y2-y1/x2-x1 = 4080-420/(27/60)-(5/60) = 9981.82 (acceleration)

VI. Conclusion
The effect of time on a falling objects velocity is dependent upon the gravitational pull.
lab-theory/theory = 9981.82-9800/9800 = 1.85% error
VII. Evaluation
Sources of error:
1. not measuring the ticker tape correctly to the exact mm.
2. not dropping the weight right when the spark timer is turned on.
3. dropping the weight at an angle and not straight down.
If I were to do this lab again I would have measure more accurately.