Divide yourself up evenly into 7 groups. Move to one of the pendulum stations around the room. Take your notebooks with you.
Learning Goal: I can...
...explain how waves are an energy transport phenomena.
...explain and predict how the relative velocities of the source of a wave and of the observer affect the frequency of the observed wave.
- ...explain and predict how waves from more than one source interfere to make waves of smaller or larger amplitude, depending on the location where the waves meet.
- ...explain and predict how wave boundary behavior can be used to derive and apply relationships for calculating the characteristic frequencies for standing waves in strings, open pipes, and closed pipes.
Today: Pendulum Lab
Given: one meter of string, a protractor, varying known masses, and commonly available equipment for measuring time and length.
Find: Each group will be responsible for finding the relationship between the period of a pendulum and one of these variables:
- mass of the pendulum bob (two groups)
- length (two groups)
- amplitude (two groups)
- Remember good scientific technique: change only one variable at a time!
- Measure the length of the pendulum to the center of mass of the pendulum bob.
- The amplitude must not be larger than 15 degrees from vertical.
- Be prepared to present your results on a board tomorrow.
Assignment:
- AP Physics 1 Test Prep Course: If you choose to do it, the deadline is April 23, but register ASAP - space is limited. See me if questions.
- PHYSICSPALOOZA: Wed. after school, 3:30-4:30
- Due Wed. 4/10: Practice 11.1 and
- Watch the video at this link (click to play).
- What observations can you make about the motion of these three objects? In what ways are they similar and in what ways are they different?
- Next, observe only the side-to-side motion. That is, ignore the vertical motion of the pendulum and the front-to-back motion of the circular motion. Describe the similarities of this side-to-side motion.
- Watch the video at this link (click to play).
- Due Fri. 4/12:
- Friday, 5/4: Summative Test - SHM/Waves/Sound/Electrical