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Investigating factors that affect the swing of a pendulum

Extracts from this document...

Introduction

Candidate Number: 4882

Centre Number: 14320

Mrs Dibbs

Physics course work – Investigating factors that affect the swing of a pendulum

Aim:

During this investigation I will isolate and investigate some of the factors that affect the amount of swings that a pendulum can complete in a given amount of time.

Introduction:

A Pendulum comprises of a ‘rod’ (a length of material, it can be flexible or rigid) and a ‘bob’ (a weight which is attached to the rod), these then oscilate, by altering the properties of these two factors it is possible to achieve any rate of ‘regular swing’, once the desired rate is achieved, a pendulum can be used to govern any types of machinery.

Plan:

Middle

The apparatus I will use for this experiment will be:

A stand

A boss

A clamp

String

10g slotted mass’s

A stop clock

Diagram:

Once I have set up the apparatus, I will hold the bob in my hand, and release it from a 45 degrees angles, then I will count how many times the pendulum swings back and forth, thus completing one swing.

Obtaining Evidence:

To make the results accurate I repeated each experiment 3 times, and then averaged the 3 results to give an accurate and fair measurement.

Conclusion

c0">30 secs.

29

29

30

29.3

50g

25cm

30 secs.

27

28

27

27.3

50g

30cm

30 secs.

25

25

25

25

50g

35cm

30 secs.

23

23

23

23

50g

40cm

30 secs.

22

22

21

21.7

50g

45cm

30 secs.

21

20

21

20.3

50g

50cm

30 secs.

20

19

19

19.3

From this graph you can see that there is a clear connection between the length of the rod and the number of swings, in that the shorter the rod, the more swings the pendulum can complete. This supports my prediction because, as the rod was made longer, the number of swings completed in 30 seconds decreased.

Evaluation:

I feel that the results that were gathered were accurate and fair as the repeats gave similar results, and set a clear trend.

I feel the method was appropriate but that it could have been made better by using some kind of automated counting device such a

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