Lesson 005 – Mechanical oscillation (pendulum)
You need:
iTriangle MASTER online, IR gate, buzzer
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Infrared gate |
Buzzer |
Introduction:
Oscillation is a regular, rhythmic movement between two points. Its magnitude of instantaneous speed therefore varies.
Task:
Determine the dependence of the pendulum's oscillation period on the weight of the pendulum bob and the length of the pendulum bob's suspension.
Tutorial:
- Construct a simple stand with iTriangle online and connect the sensors and components as pictured below. Connect iTriangle online and upgrade its firmware by following these steps.
- Prepare the pendulum.
- Start the program.
- Press the push button switch to start your measurements.
- Using a timer, measure the time for five periods of oscillation. To automatically determine the number of oscillations, use the IR gate to trigger the buzzer when the pendulum passes near it. Write the measured time into the table below and recalculate it for one period.
Oscillation parameters
Amplitude – the maximum distance the pendulum bob moves away from the center point
Period (T) – the time of a full swing back and forth of the pendulum (measured in seconds)
Frequency (f) – the number of periods per second s-1 = Hz (s-1 = frequency units; Hz = Hertz)
f = 1/T
Worksheets
Pendulum bob – dependent on weight only, length of suspension is same for all measurements
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Weight (number of attached wheels) |
5 periods (10 T / s ) |
1 period ( T / s) |
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Pendulum bob – dependent on length of suspension only, weight is same for all measurements
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Extra mile:
Examples of good practice:
Technical notes:
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