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Research Question: To determine the speed of a pulse in a thin metallic spring.

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Lab Report

Research Question: To determine the speed of a pulse in a thin metallic spring.


  • Dependent:  Length of spring
  • Independent:  Period of pulse
  • Control: How big the pulse is


  • Thin metallic spring
  • Chairs(x2)
  • Stopwatch

Methodology Setup:



  1. Two chairs were aligned as bases, one opposite of the other with a distance of 6,49 m and a spring was attached at the end of each chair.
  2. One person operated the stop watch, while the other created the pulses. A third person wrote down the results shown in the stopwatch.
  3. The stopwatch was simultaneously operated so it would start counting when the pulse was created and stop counting when the pulse returned to the base that it started.
...read more.


1.05 ± 0.01s

No 41

1.24 ± 0.01s

No 74

1.42 ± 0.01s

No 9

1.21 ± 0.01s

No 42

1.16 ± 0.01s

No 75

1.04 ± 0.01s

No 10

1.21 ± 0.01s

No 43

1.04 ± 0.01s

No 76

1.12 ± 0.01s

No 11

1.22 ± 0.01s

No 44

1.11 ± 0.01s

No 77

1.12 ± 0.01s

No 12

1.13 ± 0.01s

No 45

1.08 ± 0.01s

No 78

0.97 ± 0.01s

No 13

1.19 ± 0.01s

No 46

1.03 ± 0.01s

No 79

1.10 ± 0.01s

No 14

1.03 ± 0.01s

No 47

1.10 ± 0.01s

No 80

1.16 ± 0.01s

No 15

1.18 ± 0.01s

No 48

1.10 ± 0.01s

No 81

0.97 ± 0.01s

No 16

1.15 ± 0.01s

No 49

1.04 ± 0.01s

No 82

1.24 ± 0.01s

No 17

1.17 ± 0.01s

No 50

1.32 ± 0.01s

No 83

1.03 ± 0.01s

No 18

1.09 ± 0.01s

No 51

1.40 ± 0.01s

No 84

1.07 ± 0.01s

No 19

1.09 ± 0.01s

No 52

1.20 ± 0.01s

No 85

1.10 ± 0.01s

No 20

1.13 ± 0.

...read more.



One improvement in this particular experiment could be the use of a new thin metallic spring rather than the old, rusty and weak spring that we used. Another improvement could be using electronic timing equipment and videotaping the movement, which would give us a much more accurate result, since we could actually see in the frames/sec the start of the pulse and the end of it. One last improvement would be to repeat the experiment some more times and also maybe use different size springs.

...read more.

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