DAY 28
WARM-UP (10/31/16)
A Cessna 172 is flying at 200km/h at a constant altitude of 1000m over the Van Nuys Airport. Mr. A drops the pumpkin out the window. USE G.U.E.S.S.
A. What was the initial vertical velocity of the pumpkin?
B. How long does it take to impact the ground?
CLASSWORK
1. Free-Fall Lab
You'll need to log in to a school Google account to submit this on Friday (11/04) . Try out your account now...
A. First, review the lab instructions here: LINK
You'll need to make a copy of the lab report. Once you've saved a copy, share it with your group-mates.
B. Second, write down any questions you have on the board by the struggle zone
Mr. Alexander's email to share your lab: j.alexander@tch.birminghamcharter.com
C. Third, choose roles for this lab LINK
D. Begin!! Fill in data tables, answer questions, work on the procedure, analysis, etc.
2. Lab Report
SOME TIPS ON WRITING LAB REPORTS: http://www.chem.ucla.edu/~gchemlab/labnotebook_web.htm
Here's what needs to be included in your lab report:
Introduction
Materials: List all the materials used in your experiment.
Procedure: List all steps that your group followed in this experiment. Include diagrams of your experimental setup. Your procedure should be detailed enough that another group could follow your steps and get the same conclusions.
Data: Data should be listed in data tables. There should be one data table for each trial.
Analysis: Answer the analysis questions.
Conclusion: Include the following components:
What you did: Reiterate your procedures briefly (including any changes you made).
What you found: Restate any results that you may have calculated (with errors if applicable). You don't need to include the raw data, but if you calculated an average over several trials, state the average (not each trial). Usually you want to report the results as x +/- y (like 2.345 +/- 0.003), where y is the absolute error in x. In this case, you're comparing measured acceleration with actual acceleration
What you think: What do your results mean? Are they good? Bad? Why or why not? Basically, comment on the results. If your experimental error (RAD, RSD) is small or large compared to the inherent error (the error in the standards and equipment used), comment on what this means, too.
Errors: Speculate on possible sources of error. For the error portion:
What sources of error did you identify during your experiment?
How many sources of error were sources that your team had control over?
For one of the sources of error you identified in #2, suggest a possible way to change the experiment to minimize that source of error.
3. Practice Problems
HOMEWORK
Exam Tuesday
Practice Problems: pg 75: 48, 50 pg 83 #105
GOALS: SWBAT...
1. Define Inertia
2. Use Newton's Laws to solve problems
3. Classify forces according to the agents that cause them
WARM-UP & Homework check
Watch Mr. A roll the metal ball bearing across the flat table.
1. Does the ball slow down rapidly? (Yes/No) Why or why not?
2. What is the term that describes the tendency of an object to resist change?
3. Lets assume the ball bearing rolls at a constant velocity. What does that say about the forces acting on the object?
4. If Nathan buys a dozen cupcakes for $4, and sells them all for $1 each, what is his net gain, or profit? Based on this question, what does the term "net" mean?
HW REVIEW
Inertia:
Equilibrium:
8:
9:
10:
CLASSWORK
Pg 95 11-14
Inertia, Net Force, Newton’s Laws Notes
1. What does the phrase, “state of motion” mean?
2. Write a mathematical equation for the “change in the state of motion.”
3. Define “mass” in terms of inertia.
4. Redefine “mass” in terms of acceleration.
5. Which object that Marcia pushes will be harder to move? Which has greater inertia?
TO BE CONTINUED ON MONDAY...
HOMEWORK
Read pg 96-98 (try example problem #1)
Reading Quiz Monday