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Physics-Spring investigation

Extracts from this document...

Introduction

Murad Azhar                                        Physics CW                                      Mr. Wilkinson

Spring Investigation (Physics Coursework)

Aim:

For this investigation I will explore and examine the behaviour of springs when applied a weight and a force to them. I am aiming to achieve a direct relationship between the period it take to complete 30 oscillations and the weight applied to the spring.

Planning:

Prediction:

Similar to my aim I predict a directly relationship between the period it takes to complete a number of oscillations and the weight or mass applied to the spring. This means that as I increase the amount of weight or mass the period should also increase. If there is a direct relationship between the period and the weight the graph should have a straight line because as the x value increases the y value should increase proportionally. This prediction is based on Hooke’s law which states that the extension of a spring is directly proportional to the weight or mass applied to it.

I will find out the correct equation after I get my results and convert them into a graph.

Fair testing:

Controlled variables:

My controlled variables

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Middle

Weight or mass

Period 1

Period 2

Period 3

Period 4

Period 5

(g)

(s)

(s)

(s)

(s)

(s)

200

10.3

10.2

10.3

10.2

10.2

300

13.2

13.2

13.2

13.2

13.2

400

14.5

14.5

14.4

14.5

14.5

500

16.0

15.9

16.0

16.0

16.0

600

17.5

17.5

17.5

17.5

17.5

700

18.7

18.7

18.8

18.6

18.7

800

20.4

20.4

20.3

20.5

20.4

Processed data:

After looking at the data I realised that the weight is directly proportional to time2. So I decide to

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Conclusion

Sufficiency of data:

        I think that my data was sufficient enough but it could have been better. I should have done experiments on two other masses, 900g and 1kg so that my graph would be more complete. However, this does not mean that my results were not reliable as I mentioned that the correlation coefficient was 0.997 which means that all points were extremely close to the line if not on the line. As you have seen from the graph and results box that my results make my investigation successful.

Further work:

First of all I would experiment on different types of springs with different coils and different elastic limits to find the out how it affects the period. I would also use more variety of masses. Finally I would use either a motion detector or a light sensor which would automatically measure the time and would reduce the errors carried out because of human reaction time.

...read more.

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