Investigating how the length of a simple pendulum can affect the time for a complete swing.

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Pendulum Investigation

Contents

Plan

Prediction

Equipment

Safety

Method

Variable table

Preliminary Data

Results

Secondary Evidence

Result Table

Secondary Evidence Table

Analysis and Evaluation

Conclusion

Investigating how the length of a simple pendulum can affect the time for a complete swing.

Plan

Variables

Length – I am going to investigate the effect of using different lengths of string.

Size of swing – I am going to ensure that the size of swing is always the same.

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Prediction

The diagram is showing two pendulums swinging.  The red one is twice as long as the blue one.  The blue pendulum is at a greater angle than the red pendulum.  I think the blue string pendulum will swing quicker than the red string pendulum, because it has a steeper angle, which will cause a greater acceleration.  It is also higher than the long pendulum so it has more potential energy at the same horizontal displacement.

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Equipment and Safety

Equipment list

Digital stopwatch

One 200 gram mass

1 piece of string (100cm)

1 clamp stand

1 G-clamp

2 small wooden blocks

1 Protractor

1 meter ruler

1 Hanger

Safety

All the equipment must be constructed securely.  A G-clamp is necessary to support the clamp stand.  Wooden blocks help to secure the string at one end and the other end must be tied onto the mass hanger well.

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Method

1.  I am going to clamp the piece of string between two small blocks of wood ensuring that the blocks were level with each other so that they would not effect the pendulum swinging.

2. A mass of 200 grams is going to be attached securely to the end of the string.

3. I am going to be start swinging at 10 degrees using a protractor to measure the angle.

4. I am then going to swing the pendulum 20 times with each piece of string.  The lengths of string are going ...

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