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To investigate the amount of time it takes to complete one swing from points A-C.

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Introduction

PENDULUM

Introduction

To investigate the amount of time it takes to complete one swing from points A-C.

Prediction

As a pendulum swings we give it gravitational energy.

The law of conservation of energy states that energy cannot be destroyed and it can only be changed.

As the pendulum reaches the middle of the swing, the gravitational energy changes to kinetic energy.

The drawings that I drew on the previous page show that all of the pendulums have the same gravitational energy, as they are all lifted the same height (the drawings show this by lifting up the pendulum every two lines on each drawing).

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Middle

                B                        Ruler

     A                        C

Desk                Pendulum

swinging

The simple sum that can be done is 2πr  x

                                                               360

Apparatus

Ruler, Stop clock, string, weight attached to string, clamp stand, extra weights.  

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Conclusion

I increased the length of the string each time by 10cm every time the pendulum was swung.

To make this a fair test  

To make this a fair test I will have to:

Keep all the variables constant, including the mass and the height.

Only change the length of the string, as this is the variable that I am changing.

Start at 10cm.

End at 100cm.

To make my experiment accurate I will time how long it takes to time 10 swings and divide it to find out how long it takes for the pendulum to swing 1 swing.

RESULTS

TABLE TO FIND TIME²

...read more.

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