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# How Easily A Material Stretches under Pressure

Extracts from this document...

Introduction

## Sc1 Investigation: How Easily A Material Stretches under Pressure

Apparatus:

Diagram:

The diagram shows an example of a rubber band being stretched some weights. The way you set up this apparatus is you attach the rubber band and the ruler to the stand  and put the weights on the end of the material and then you just read the measurements.

Help:

In this investigation I had 2 partners Fielde Fargason and Richard Hart.

Result Tables:

In this investigation ive done a lot of things to make the investigation is fair, safe

and accurate.

Middle

Average

Extension

1

32.7

32.6

32.65

0

2

37.1

37.3

37.2

5.45

3

41.1

41.2

41.15

8.5

4

45.5

45.4

45.45

12.8

5

49.8

49.8

49.8

17.15

6

7

8

9

10

You can tell by the tables results that the spring stretched to much and the rest of the results could not be recorded.

Material:Spring Size: Tightly coiled

 Force (N) 1 2 Average Extension 1 27.1 27.1 27.1 0 2 27.3 27.2 27.25 0.15 3 27.3 27.3 27.3 0.2 4 27.4 27.5 27.45 0.35 5 27.5 27.6 27.55 0.45 6 27.6 27.6 27.6 0.5 7 27.7 27.7 27.7 0.6 8 27.9 27.9 27.9 0.8 9 28.1 28.0 28.15 1.05 10 28.2 28.2 28.2 1.1

You can see from the table above that the spring was very

Conclusion

">

1

26.7

26.8

26.25

0

2

27.8

28.0

27.9

1.65

3

29.0

29.2

29.1

2.85

4

30.1

30.4

30.25

4

5

31.4

31.7

31.6

5.35

6

32.6

32.9

32.75

6.5

7

33.7

34.0

33.85

7.6

8

34.8

35.0

34.9

8.65

9

36.1

36.1

36.1

9.85

10

37.2

37.2

37.2

10.95

From the results above you can tell that the spring was quite loose because every 1N added to the spring it stretched by at least 1 cm.

Material: Plastic Bag   Size:134mm Wide

 Force (N) 1 2 Average Extension 1 30.2 30.6 30.4 0 2 30.3 30.6 30.45 0.05 3 30.4 30.6 30.5 0.1 4 30.5 30.6 30.55 0.15 5 30.6 30.7 30.65 0.25 6 30.7 30.7 30.7 0.30 7 30.7 30.7 30.7 0.30 8 30.7 30.7 30.7 0.30 9 30.7 30.7 30.7 0.30 10 30.8 30.8 30.8 0.4

You can tell by the results above that a plastic bag doesn’t stretch a lot. When we tested it for the second time the bag was already stretched into a new size so the two different results in the columns named 1 +2 should be quite different.

This student written piece of work is one of many that can be found in our AS and A Level Waves & Cosmology section.

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