Hubay
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#1
Report Thread starter 7 years ago
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Hello again, I was just wondering if anyone can help me plan a pendulum experiment, I know what I need

- Pendulum
- String
- A clamp and stand
- Stopwatch
- Light gate (potentially to be used as a more precise measuring device)
- Ruler / Protractor / Stopwatch

I was just wondering if anyone could give me any advice with regards to what I should alter, (length) or (angle) when determining acceleration due to gravity (gradient of eventual graph). Also if anyone can help in how I would use the lightgate
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Ollywedgwood
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Report 7 years ago
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Hi, I'd suggest...

Variables to keep the same:
- initial amplitude of swing (or angle)

Variables to change:
- length of the pendulum

Variables to measure:
- time taken for 10 swings (use a fiducial mark to time your swings - a marker halfway in the swing, at the equilibrium position)
You can then take an average by dividing by 10 to reduce experimental error.

Graph to plot:
- the relationship between pendulum length and period is T = 2pi(L/g)^0.5
If you plot T vs L^0.5 you should get a straight line - you can then measure the gradient and then calculate g.

Hope that helps!
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Hubay
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Report Thread starter 7 years ago
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(Original post by Ollywedgwood)
Hi, I'd suggest...

Variables to keep the same:
- initial amplitude of swing (or angle)

Variables to change:
- length of the pendulum

Variables to measure:
- time taken for 10 swings (use a fiducial mark to time your swings - a marker halfway in the swing, at the equilibrium position)
You can then take an average by dividing by 10 to reduce experimental error.

Graph to plot:
- the relationship between pendulum length and period is T = 2pi(L/g)^0.5
If you plot T vs L^0.5 you should get a straight line - you can then measure the gradient and then calculate g.

Hope that helps!

Thanks a lot dude!
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