Constant Velocity and Relative Motion
PW and DC decided to focus on displacement, velocity, and the constant velocity model. PW thinks (DC agrees) that the notes for relative motion are good enough.
Pre-lecture Video
Anchor in the motion of an asteroid far from other objects.
- Draw setup (two locations, two times)
- Displacement (sketch and write words and symbols)
- Convert to predicting (demonstrate with plot)
- No mention of the rate at which this occurs
- Define average velocity (discuss why average?)
- Convert to prediction (demonstrate with plot)
- Going from average to instantaneous
- Where's the “conceptual” calculus? You will deal with that in class together
- First model - constant velocity model
- Average equals instantaneous
Possible Conceptual HW
- From PHY183_Lecture_Week2_F2013 (caveat: students need to think about slope of position vs time and area under velocity vs time):
- 2-1, 2-2, 2-3a, 2-3b, 2-4, 2-5, 2-6, 2-6b, 2-6c
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- 3-13 (2 of them; mislabeled), 3-17, 3-18