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Lecture 8:

Prepare midterm 1: Useful links on our course homepage

• Advice on review for an exam
• Advice on taking an exam.

Review on selected topics:

Chapter 3: Vectors

• Cartesian coordinates (x,y). Polar coordinates: (r, q)
• Vector addition
• Dot product
• Method of parallogram:
1. Formula for C
2. Formula for D: Law of cosines PQ3-4

Chapter 4:

• Monkey and Bullet problem: Exercise: PQ4-3
• Relative velocity: V_AB+V_BC=V_AC. HW 3-22

Chapter 1:

• Dimensional analysis: Determine powers of M, L, T based on dimensional analysis, PQ1.6

Chapter 2: Please review on your own.

• Displacement curve (displacement vs t), velocity curve and acceleration curve
• Displacement is the area under the velocity curve
• Average velocity, average acceleration; corresponding instantaneous quantities
• Motion with a constant acceleration:
• Demonstrate all 1d constant acceleration problems you have encountered can be solved using vt, st and vs pair-relations.
• Rising ball problem: Verify t_rise=v₀/g, and h=v₀²/2g. Falling ball problem: Determine v_final and t_fall.
• If there are two moving objects involved, use two sets of tvs-triangles.

Reminder: Tuesday’s Instructor’s informal section – RAS 218, 3:30-4:20 pm.

§ Review unit 1 and a preview on HW4.