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# For my coursework investigation I have been asked to investigate the effects on the swing of a pendulum. The effects that I thought most suitable are length of string, weight of mass and angle of release.

Extracts from this document...

Introduction

## Physics Coursework

#### My investigation

For my coursework investigation I have been asked to investigate the effects on the swing of a pendulum.  The effects that I thought most suitable are length of string, weight of mass and angle of release.

Apparatus

The apparatus, which I will need for the investigation, are:

String

Various sized masses

Clamp and stand

Brick

Stopwatch

Protractor

Rule

#### Apparatus

String

Various sized masses

Clamp and stand

Brick

Stopwatch

Protractor

Rule

#### How I will set up my investigation

I will set up my investigation by putting a clamp and stand on a table and attaching a string to the clamp.  At the end of the string will be the masses and at the bottom will be a brick to weigh the clamp down.

#### Diagram to show set up of my investigation

Middle

1.7

50

40

60

17.58

1.8

60

40

60

18.02

1.8

70

40

60

18.38

1.8

80

40

60

19.98

2

90

40

60

19.32

1.9

100

40

60

20.05

2

Changing the angle of release

 Weight (g) Angle of release (deg.) Length (cm) Time 10

Conclusion

"1">

15.84

1.6

70

90

60

17.42

1.8

70

100

60

17.11

1.7

Changing the length of the string

 Weight (g) Angle of release (deg.) Length (cm) Time 10 swings (secs) Time average (secs) 70 40 100 20.27 2 70 40 90 19.59 2 70 40 80 18.71 1.9 70 40 70 17.66 1.8 70 40 60 15.99 1.7 70 40 50 14.39 1.4 70 40 40 13.02 1.3 70 40 30 11.77 1.2 70 40 20 9.44 1 70 40 10 8.62 0.9

Conclusion

I have found that the only effect that significantly alters the speed of a swing on the pendulum is the length of the string.  This shows that my prediction was wrong as I thought the angle of release would also change but I was correct that the length of the string would affect time.

This shows me that the moment of a force equals force multiplied by distance from fulcrum to line of action of the force

This student written piece of work is one of many that can be found in our GCSE Forces and Motion section.

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