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Lecture 3

Iclickers: Beta test

1d motion with a constant acceleration

1. Lemma: When a = constant, average velocity = (v1+v2)/2.
2. General kinematics of 1d motion

2.1 Essential quantities: TVS-chart

2.2 tvs-triangle: vt-, st- and vs-pairs

3. Applications:

· t_rise, h

· |v_fall|=|v₀|, t_fall=t_rise.

To do list:

• Work through today’s lecture.
• Understand the TVS chart and the tvs-triangle.

The triangle defines the relationship of vt-, st- and sv- pairs. These relationships are basic formulas. Memorize them.

• Read chapter 2 and preview chapter 3.
• Practice PhysiQuiz problems: PQ 2-6, 7, 8, 9.
• Start working on HW2. Your goal is to complete HW2 by this weekend.
• On this Friday, there will be an informal session from 4-5pm. There is a room change for Friday’s informal session. From this point on. whenever we meet for the Friday session it will be in ECJ 1.204, not in RLM5.116.