1112+Pendulum

The results from the class's pendulum experiments are listed below.

Each student should write a two-paragraph summary of this experiment. Write your paragraphs on a sheet of paper, add your name and then hand them to Mr. Robinson.
 * In the first paragraph, summarize the types of experiments that were attempted. Identify all the variables that were changed (for example, the mass, length, type of material, etc.)
 * In the second paragraph, summarize the results. Use the numbers for frequency when you compare the experiments. Frequency is measured in Hertz. You should mention a few numbers when you summarize the results. However, it is impossible to mention all of the numbers. There are three ways to deal with this problem.
 * average a group of numbers and state the result as "the average frequency is ..."
 * provide a range - "the frequencies of the trials ranged from 0.025 to 0.029"
 * provide an estimate - "all the frequencies were close to 1.45"

Group: John and Min-Xiu

Description of Pendulum:yellow meter stick held at the end of the stick

Data and Results Table: The Behavior of a meter stick Pendulum as it's release angle is Varied


 * = Angles ||||||= Period(s) ||||||= Frequency(1/s) ||
 * =  ||= Trial 1 ||= Trial 2 ||= Trial 3 ||= Trial 1 ||= Trial 2 ||= Trial 3 ||
 * = 90 ||= 9.43 ||= 8.68 ||= 8.86 ||= 0.535 ||= 0.576 ||= 0.564 ||
 * = 80 ||= 8.89 ||= 8.95 ||= 9.00 ||= 0.562 ||= 0.559 ||= 0.555 ||
 * = 70 ||= 8.92 ||= 8.61 ||= 8.82 ||= 0.560 ||= 0.581 ||= 0.567 ||

Group: Vicky and Jane

Description of Pendulum: Pendulum bobs are chinese jiaos.

Data and Results Table: The Behavior of a Pendulum with 34 cm string, starting at an 180* angle as the pendulum bob's mass is Varied
 * Mass of Pendulum Bob(g) ||||||= Period ||||||= Frequency ||
 * || Trial 1 || Trial 2 || Trial 3 || Trial 1 || Trial 2 || Trial 3 ||
 * 3.21 || 11.89 || 12.28 || 12.10 || 0.8410 || 0.8143 || 0.8264 ||
 * 9.63 || 12.58 || 12.62 || 12.54 || 0.7949 || 0.7924 || 0.7974 ||
 * 16.05 || 12.61 || 12.71 || 12.70 || 0.7930 || 0.7868 || 0.7874 ||

Group: Brandon and Eigo


 * Measures || Trial1 || Trial2 || Trial3 ||
 * 100cm || 16.2 || 16 || 15.5 ||
 * 85 cm || 14.5 || 15.7 || 14.7 ||
 * 70 cm || 14 || 15.9 || 15.3 ||

Frequencies:


 * Measures || Trial1 (1/s) || Trial2 (1/s) || Trial3 (1/s) ||
 * 100cm || 0.0617 || 0.0625 || 0.0645 ||
 * 85cm || 0.0689 || 0.0680 || 0.0680 ||
 * 70cm || 0.0714 || 0.0629 || 0.0654 ||

Group: Maiti and Flo

Description of Pendulum: 2 arcade coins on the end of 41 cm string


 * || Period 1 || Period 2 || Period 3 || Frequency 1 || Frequency 2 || Frequency 3 ||
 * Angle 1 || 14.13s || 13.50s || 13.80s || 1.41 || 1.35 || 1.38 ||
 * Angle 2 || 13.85s || 13.30s || 13.27s || 1.38 || 1.33 || 1.23 ||
 * Angle 3 || 12.82s || 12.63s || 13.39s || 1.28 || 1.26 || 1.34 ||

Group: Kat & Chloe

Description of Pendulum: Pendulum made of rope string and bob is a US penny. It is suspended at a constant of 90º and we are changing the length of the string.

Data and Results Table: The Behavior of a Pendulum with the mass of the bob at 2.5g, starting at an 90º angle as the pendulum's length is Varied
 * Length of Pendulum (cm) ||||||= Period ||||||= Frequency ||
 * || Trial 1 || Trial 2 || Trial 3 || Trial 1 || Trial 2 || Trial 3 ||
 * 80 || 1.75 || 1.81 || 1.87 || 0.571 || 0.552 || 0.535 ||
 * 50 || 1.45 || 1.47 || 1.45 || 0.890 || 0.680 || 0.690 ||
 * 30 || 1.24 || 1.15 || 1.13 || 0.806 || 0.870 || 0.855 ||