Classes 9.5 (Monday, 9/24), 10 (Tuesday, 9/25), and 10.5 (Wednesday, 9/27)

Work through these notes and problem sets.  Please help one another.  Also ask Mr. Chase for help.  If you sign up for my Flex, he is in the same room (C211/212). 

Online Textbook (OpenStax) Reading: 

 
Schedule Item Where to find it Directions Solutions Links Video Links
Monday Drawing and calculating Orthogonal Vectors  Top cubby
2nd column from the right.  It's part of the big handout from last week
  • Check your answers to Friday's homework by looking at the solutions.
  • At a minimum, complete the last orthogonal vector problem.  If you want more practice, do the others.
(Solutions) Video:  Intro to 2-D Kinematics and Vectors

Vector Addition (drawing and calculating orthogonal and non-orthogonal)
Monday Drawing and Calculating Non-Orthogonal Vectors Top cubby.  Part of big handout from last week
  • Same as orthogonal problem directions, above.
(Solutions) See above
Monday night homework Classic River Problem   Top cubby.  Part of big handout from last week
  • Complete the problem.  Try it on your own.  If you need help, look at the solution.
  • On Tuesday, check your work.  Get help from other students if you need it.
Solution  
Tuesday (Full block)  -- and Tuesday night, if necessary Still more river problems #2-5 Top cubby.  Part of big handout from last week
  • Complete river problem #2, then check your answer.  I shared two sets of solutions.  If you don't understand the solutions, watch a video, on the right.
  • Continue working on #3, 4, and 5.  Check each problem as you complete it.
2017 Solutions to Still more river problems -- with tables 
Old solutions (no tables) -- (solutions 2-3) (solutions 4-5)
#5 video  #4 video  #2 and 3 video -- old solutions
Wednesday (split block) Currents and Projectiles -- Notes and Practice Problems 2nd cubby from the top.
  • Complete the notes section of the handout.  You can look at the completed notes on the right, or you can play the video.  If the class chooses, you can play the video using the teacher computer and the projector.
Filled-in notes and solutions Video of Notes from Class
Wednesday (finish at home) Chapter 3 Practice Test 3rd cubby from the top
  • Complete problems #3 and #4 practice test.  There is a video for these problems.
Solutions  Ch3 PTest Conceptual Questions Video   Ch3 PTest Probs 1-2 Video Ch3 PTest Probs 3-4 Video


Class 9 Friday, 9/21/18

Warm Up :  

1.  What are sine, cosine, and tangent?

2.  Find the missing vector magnitudes on the right.

Today: 

  • Mr. Stapleton will be gone on Monday through Wednesday. I will leave problems, solutions, and videos on this website.  There will be paper copies of the problems and questions in the classroom, in the wooden cubbies in the front of C209, 2nd cubby column from the right.
  • Preview of this unit -- What's on the Chapter 3 Test
  • Vector Addition --Head to Tail Method

     

Online Textbook (OpenStax) Reading: 

Homework: 

Class 8.5 Thursday, 9/20/18

Warm Up:  

1.  Suppose the two vectors on the right represent two forces acting on the clam.  In what direction will the clam accelerate?  What will be the magnitude of the net force accelerating the clam in that direction?

2.  The diagram on the right shows a top view of a train car that is moving at a rate of 2m/s.  You are in the car.  In which direction and how fast should you walk in order to have the intended velocity shown on the right.

 Today:

Online Textbook (OpenStax) Reading: 

Homework:

  • Read my comments on your video analysis  (A5/6A7/8) .  If you have a yellow cell, you must redo whatever is yellow.  Otherwise, making corrections is not mandatory.
Class 8 Wednesday, 9/19/18

Warm Up:   No warm-up today

 Today:

  • Test, 1-D Kinematics

Online Textbook (OpenStax) Reading: 

Homework:

  • Read my comments on your video analysis  (A5/6A7/8) .  If you have a yellow cell, you must redo whatever is yellow.  Otherwise, making corrections is not mandatory.
Class 7.5 Tuesday, 9/18/18

Warm Up:

1.  Propose an explanation for why this velocity graph is so scattered looking.

2.  What five variables should you look for in kinematics problems?

Today:

  • I finished reviewing and making comments on the video analyses  (A5/6A7/8) .  If you have a yellow cell, you must redo whatever is yellow.  Otherwise, making corrections is not mandatory.
  • Completion of the video analysis is required, unlike ordinary homework.  If you have not submitted analysis videos and graphs, you may still do it for credit.
  • Check/review 1-D Kinematics Practice Test #2Solutions  and "More Kinematics Problems"  Solutions

Homework:

  • Test tomorrow.  Bring a pencil and a calculator.
Class 7 Monday, 9/17/18

Warm Up:

1. Eliud Kipchoge ran 26.22 miles in a time of 2:01:39.  What was his average Δt, in minutes and seconds, for each mile?

2.  Why is a marathon 26 miles, 385 yards?

3. Take a look at the formulas that you will be given on the test.

Today:

Online Textbook (OpenStax) Reading: 

Homework:

  • Finish  1-D Kinematics Practice Test #2Solutions  and "More Kinematics Problems"  Solutions
  • Test on Wednesday:
    • Format:  2 short answer (4pts total), 14multiple choice (14 points), 1 unit conversion problem (2pts), 5 one-part problems (20pts), 1 extended problem with 6 parts (12 pts).  52 points in all, worth at least 80% of your grade as of Thursday.
    • Topics on the test:  What it can mean to have different combinations acceleration (+,-, or 0) and velocity (+,-, or 0); graphing; free-fall; unit conversion; problems (identifying variables and applying correct formulas), including proper units, showing work for partial credit, formulas for average velocity and acceleration
    • What to study:  notes, homeworks (including Mr. Pennington's old test), practice test.  Video analysis will not be on the test.
Image result for celebratory gunfireClass 6.5 Friday, 9/14/18

Warm Up:

Sometimes people celebrate special occasions by firing guns into the air. 

1.  Is this a dangerous way to celebrate?  Why, or why not?

2. Why don't clouds fall out of the sky?

Calculated terminal velocities of various spheres.

Today:

Online Textbook (OpenStax) Reading: 

Homework:

Class 6 Thursday, 9/13/18

Warm Up:

1.  A race car is traveling counterclockwise around a circular track.  The car's speedometer stays on exactly 100mph the whole time.

Describe what happens to each of the following as the car makes one revolution around the track:  

a)  the car's speed   b) the car's velocity  c) the car's acceleration.

2.  All of the speed calculations in the screenshot on the right (blue) are slightly off, and the last speed calculation (red) is really, really off.  Why?

 

Today:

Coming Up:

  • Friday -- 2nd practice test (includes an extended problem)
  • Monday -- Review 2nd practice test
  • Wednesday -- Chapter 2 Test -- 1-D Kinematics
  • Some day (probably) -- Quiz over video analysis

Online Textbook (OpenStax) Reading: 

Homework:

Class 5.5 Wednesday, 9/12/18

Warm Up:

Match each position vs. time graph with the correct velocity and acceleration graph.

Today:

Coming Up:

  • Thursday -- watch some videos, more practice problems
  • Friday -- 2nd practice test (includes an extended problem)
  • Monday -- Review 2nd practice test
  • Wednesday -- Chapter 2 Test -- 1-D Kinematics
  • Some day (probably) -- Quiz over video analysis

Online Textbook (OpenStax) Reading: 

Homework:

Class 5 Tuesday, 9/11/18

Warm Up:

A ball is launched directly upward from the Earth's surface.  The ball returns to Earth and hits the ground after a time of 10 seconds.  Assuming no air resistance and g≈10m/s2, fill in the values in the diagram on the right. [Though the diagram appears to show horizontal motion, assume that there is none.]

Today:

  • Check/review homework Mr. Pennington's Old 1-D Kinematics Test Answer Key
  • Work time:
    • Mr. Pennington's test -- solve the problems
      • Remember that, on a test, you may receive partial credit for:  Useful Equation(s), correct identificaton of all given variables, math/computation, reasoning, units
    • Finish video analyses

Online Textbook (OpenStax) Reading: 

Homework:

  • Due tomorrow:  Complete the problems section of Mr. Pennington's Old 1-D Kinematics Test Answer Key
  • Video Analysis is due tomorrow -- Complete your row of your class' spreadsheet (A5/6A7/8). 
    • Make sure that everything (videos and spreadsheets) are shared with "anyone with a link."
    • Fix your motion graphs so that they correctly represent the motion from your video.  
Class 4.5 Monday, 9/10/18

Warm Up:

The symbol "g" usually represents the absolute value of the acceleration of gravity near Earth's surface (in the absence of air resistance).  The approximate value of g is 9.8m/s2.

For the sake of simplicity, use g = 10m/s2 to complete the motion graphs for an object with v0 = 20m/s and y0 = 0m.

[Ignore air resistance.]

Today:

  • Brief demo -- how to use formulas in a spreadsheet.
  • Finish individual video analysis work:
    • Choose two videos to analyze.  One must use the stationary camera method (Logger Pro Method), and one must use the moving camera method (Quicktime).
    • Click one of these links to your class spreadsheet -- A5/6A7/8
    • Enter your name on the next open row.   Insert links to your videos into columns C and G.  Enter descriptions of what the video is supposed to demonstrate into columns B and F.

Tomorrow: 

  • Review homework

  • ?

  • Work time: 

    • Extended problem(s)

    • Wrapping up video analysis?

Online Textbook (OpenStax) Reading: 

Homework:

  • Due tomorrow:  Complete the multiple choice section of Mr. Pennington's Old 1-D Kinematics Test Answer Key
  • Video Analysis is Due on Wednesday -- Complete your row of your class' spreadsheet (A5/6A7/8). 
    • Make sure that everything (videos and spreadsheets) are shared with "anyone with a link."
    • Fix your motion graphs so that they correctly represent the motion from your video.  In cases where your video was rotated sideways in Logger Pro, you may use formulas to fix the data or you may resolve the confusion with creative y-axis labeling.  For example, if your video shows a dropped ball, but the video is rotated counter-clockwise, so that the ball seems to accelerate positively to the right, you may label your velocity graph y axis with the following statement "speed in the direction of the ground (meters)."  For objects with diagonal motion, you will need to specify which component of the object's motion is being represented, so your y axis might be labeled "upward speed," "downward speed," "rightward speed," or "leftward speed."  If you want a challenge, you could use formulas to calculate the actual diagonal speed based on the x and y velocities, using the pythagorean theorem.
Class 4 Friday, 9/7/18

Warm Up:

1. For letter a, on the right describe what an object could be doing in order to have both positive velocity and positive acceleration.

2.  Do the same for the rest of the letters.

 

Today:

  • A7/8 -- finish going over #7 and #8 from Wednesday's homework.  Answer Key -- Kinematics Formulas and Practice Problems
  • Demonstation of how to complete video analyses.  Falling object  Rubber Band Car
  • Video Links showing how to analyze videos using both methods -- created last year.
  • Begin analyzing motion videos.
    • Upload Videos to your Google Drive
    • Set your shared settings so that anyone in the district can view the videos.
    • Share the videos with your group, or send them links.
    • Individual Work:
      • Choose two videos to analyze.  One must use the stationary camera method (Logger Pro Method), and one must use the moving camera method (Quicktime).
      • Click one of these links to your class spreadsheet -- A5/6A7/8
      • Enter your name on the next open row.   Insert links to your videos into columns C and G.  Enter descriptions of what the video is supposed to demonstrate into columns B and F.
      • Use the Logger Pro (stationary camera) method first, following the Video Analysis Directions.  You should use Logger Pro first because you probably will not have access to Logger Pro at home.  Quicktime player, on the other hand, is fairly easy and free to download.
      • Analyze another video without using QuickTime (motion along a ruler).  To make your task easier, feel free to copy these spreadsheetsand modify them to meet your needs (Logger Pro method, Quicktime Method).

Online Textbook (OpenStax) Reading: 

Homework:

Class 3.5 Thursday, 9/6/18

Warm Up:

1. How does the Amazing Water and Sound Experiment work?

2.  Answer to yesterday's warm-up#3?.

Today:

Online Textbook (OpenStax) Reading: 

Homework:

Class 3 Wednesday, 9/5/18

Warm Up:

1.  Assuming that the man in the picture is 2m tall, and the frame rate of the camera was 30 frames per second, what were the approximate maximum and minimum speeds of the object?

2.  Based on your answers, do you think the assumption of 30 frames per second was too loww, too high, or about right?

3.  If you could travel in time, and you found yourself in the infinite loop of acceleration changes shown below...  a) what might your velocity and position graphs look like?, and b) would you ever find yourself in the same location as another past self?  If so, show how this could occur.

Today:

Online Textbook (OpenStax) Reading: 

Homework:

Class 2.5 Tuesday, 9/4/18

Warm Up:

A runner sprints exactly 100m, rests for a moment, and then slowly follows the same path back to the starting line.  This entire trip takes 200s.  For the questions below, consider the runner's entire round trip.

1.  What distance did the runner travel?
2.  What was the runner's displacement?
3.  What was the runner's average velocity?
4.  What was the runner's average speed?

Today:

Handouts:

Online Textbook (OpenStax) Reading: 

Homework:

Class 2 Friday, 8/31/18

Warm Up:

Use the velocity vs time graph on the right to sketch the shape of a corresponding position vs time graph.

[Hint: positive velocity corresponds to movement away from a motion sensor.]

Today:

Handouts:

Online Textbook (OpenStax) Reading: 

Homework:

Class 1.5 Thursday, 8/30/18

Warm Up:

For each letter, describe what is happening to the person's speed and direction during the 10 seconds represented on the graph.  

Today:

Handouts:

Online Textbook (OpenStax) Reading: 

Homework:

  • Course expectations signatures.
  • Suggested Reading (see above)
Class 1: Wednesday, 8/29/18

Physics 200: Mr. Stapleton

Warm Up:

Spin one of the "sprotating cylinders" by pressing one end until it squirts out from under your finger.  Try pressing the other end.

When the cylinder is spinning, why do you only see the symbol that you press?

Slow motion

Today:

  • 8 students log in to laptops ASAP 
  • Learn names/pronunciations
  • Enter attendance
  • Student info sheet
  • Mr. Stapleton philosophy, slideshow, etc
  • Briefly go over course expectations, class overview (see last year's site).
  • Motion Matching Activity -- at rink? 
  • ***A5/6 has D lunch.
  • B-Day Split block times (I think) are:
    • B5 -- 1150-12:28
    • B6 -- 12:32-1:10

Handouts:

Online Textbook (OpenStax) Reading: 

Homework:

  • Get your course expectations signed and then return them.
  • Suggested Reading (see above)