Friday, April 3, 2009 - Block 2

Talked about air resistance. Factors that affect air resistance are speed and cross-sectional area.

Discussed Air Resistance Lab.
For write-up I need the name, partner's name, name of lab, date.
Answers to Preliminary Questions. Tell me what it is you are answering in your answer.
Data table with labels and units including 3 trials for each number of filters, average terminal velocity and the square of the average terminal velocity.
Graphs: 2 graphs, VT vs number of filters and VT^2 vs number of filters. For the one that gives the best fit straight line through the origin, use the Linest function of Excel to find the slope and uncertainty in the slope.
Results:
1. Which graph gives the best fit straight line through the origin
2. Which model give the best fit, drag force = -bv, drag force = -c v^2
VT ~ mass, VT^2 ~ mass
3. Answer question 4 in analysis section.

Students worked in pairs to do the lab.