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Swingers

Swingers. Ask a Question. How many cycles do you think a pendulum will make in 15 seconds? Cycle = swing away from you and back Pendulum = mass hanging from a fixed point that is free to swinger to and fro. Form a Hypothesis. “I think that the swinger will swing ____ times in 15 seconds.”

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Swingers

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  1. Swingers

  2. Ask a Question • How many cycles do you think a pendulum will make in 15 seconds? • Cycle = swing away from you and back • Pendulum = mass hanging from a fixed point that is free to swinger to and fro

  3. Form a Hypothesis • “I think that the swinger will swing ____ times in 15 seconds.” • “I think this because…”

  4. Test the Hypothesis • Part 1 – Swingers is out of you Variables FOSS kit. • Materials needed for each group: • String (50cm) • Tape • Pencil • Paperclip • 1 penny • No. 3 Sheet: How to build a swinger? (out of your FOSS booklet) • Lab report sheet

  5. Test the Hypothesis con’t. • Pair up the students. • Make the swinger. • Tape a pencil so that the eraser end is hanging off of a desk. • Practice releasing the swinger so that it is horizontal with your desk. • One partner releases and counts the other watches the clock and starts/stops the investigation. • Repeat the process 3 times.

  6. Collect Data • On the lab report sheet record the number of cycles that the pendulum swung for each trial.

  7. Analyze Data • Create a graph using the table with data. • Label the x-axis (independent variable = Trial 1, Trial 2, Trial 3). • Label the y-axis (dependent variable = number of swings). • Determine the increments that you want to use for the y-axis.

  8. Conclusion • What did you learn about the number of cycles that a pendulum will swing in 15 seconds? • “My conclusion was that the pendulum swung ____ many times. My hypothesis was correct/incorrect because it actually swung ____ many times.”

  9. Inquire Further • Do you have any more questions? • Could you do another experiment and change only one variable? • Possible answers: • Change the length of the swinger. • Add additional mass. • Do if for a longer amount of time.

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