The BIG Push !: Pushing Me Around!

EXP 4:   NEWTON'S SECOND LAW OF CARS

Friday we accelerated my car ( and me) by pushing with the different combinations of people.
We measured that the ratio of Actual Push versus Push measure in lab was 0.76 
We accelerated the car with constant (?) acceleration for 10 meters and measure the time of the push.
To do:
Download the data to your computer by clicking here:  Car Push Lab Data

Open the Excel file or import into graphical analysis . Complete the table especially for Total Force and Acceleration.
Use this data to graphically find the mass of my car.   
Show examples of each calculation.
Consider how many significant figures are really justified by our estimates.  
Consider the range of uncertainty  of each measurement. 
Comment on:  the accuracy of our approximations.  Was the acceleration constant?  Research the actual value.

May the Forces be with you - the odds are in your favor... er...

Unit Three - Forces

Major Topics

• Newton's Laws
• Weight vs. Mass vs. Inertia
• N3L forces vs. Balanced Forces
• Solving problems in 1 and 2 dimensions (inclined planes...)
• Tension and Atwood Machines
• Friction
• Circular Motion and Centripetal Force
• Springs in series and parallel (Hook's Law)
• Velocity dependent forces (air resistance...)

Experiments and Labs:

• The Big Push: Human Car Acceleration ( see previous post for data)
• Atwood Machines 
• Springs in series and parallel (Hook's Law)
• Flying Pigs and Centripetal Acceleration

Projectile Motion and 2-D Practice Problems

Here are a few questions from Knight to review your 2-d problem solving skills. 

FOR EACH OF THESE PROBLEMS: 

DRAW A PICTURE, SHOW THE SET UP, 

SHOW THE RELEVANT EQUATIONS, 

THEN SHOW ALL WORK NEEDED. IF YOU GET STUCK, TRY A DIFFERENT APPROACH. 

STILL STUCK- MOVE ON AND WE CAN PROBLEM SOLVE ON MONDAY.  

Do these:
Chapt 4: 41, 47, 49, 51, 55, 85
Challenge questions.
Chapt 4  78 - 82  do 2 of them
Super bonus challenge: 83, 84 optional

Projectile Motion (2-D) has arrived

Projectile Motion Lab:  This weekend looks like good launching weather.

You self designed PML should be underway with data analysis and problem solving.
Remember, your goal is to conduct as complete analysis as possible for motion in 2D.
 Include:
 •Detailed tables containing all relevant data.  
•Graphs of  X vs. time,  Y vs. time and  trajectory graphs Y vs X. 
•Presentation of how you found and calculated the initial velocity and launch angle. 

Analysis:
•Using your data try to use it to answer some interesting questions (i.e. that are interesting to you)

Addtional graphs should be included between any variable that you changed and resultant

We will discuss how your lab report will be Concluded in class  10-10.

Practice Test solutions

Click here if you can't see the practice test

Welcome to Wlson AP Physics!

Hitting the Ground Running!

Welcome to AP Physics!

Have you heard of the saying "Hit the ground running"? Do you know where it comes from or why it is a good idea?   Turns out there is a lot of physics there.
You are going to have a great time this year being challenged to think and problem solve.  See if you can figure out where that phrase comes from and try to explain the physics of why that makes sense or if it is even possible. 

I can't wait to explain to you all that we are going to do.

First Things First!

Do these 2 things before our first class:  
1. Making a Homework Account

We will be using an online AP Physics homework data base.  It will allow you to check your answers and at times be able to see worked out solutions to your homework problems. It will also keep track of how many times it took you get the correct answer.

 Go to this link and start an online homework account. Click on "log in to Quest" and then choose the small print "I need a UT EID" under the login button. In the next window choose "get a UT EID". Answer no to all the questions. After you submit your information it will send your ID code to your email account. With this code you will sign in to my class and start the first assignment. You may proceed to sign in now or bring your EID code and password on Thursday. On Thursday we will log in as a class, I will start accepting your enrollment and we will start the first assignment.

This is how to sign in:
Return to the link above and log in.
You will then need to select a class based on a unique number. For Wilson AP Physics the unique number is 33133.  Enter the number 33133 and then select look up course info. Scroll down by clicking the arrow on the window that appears through the any other classes designated with that unique number until you find :

Ap-physics

33133

Wilson AP Physics C: Mechanics 2016

Duchow-pressley

block period 4

1

It will probably be one of the last ones. Select it and then select “request enrollment.”

I will have to admit you into the class. The next time you log in, after I admit you, you will be able to use the "select course" and "select assignment" windows to start the Kinematics homework.

Okay... #2-

Check you email for instructions  on how to down load the Logger Pro Software we will use for data collection and analysis.  These below do not have the passwords which you find in the email.
Logger Pro Software Downloads

Here are links to download the software  from Vernier Software & Technology. After the file has downloaded to your computer, double-click the file, and enter the password to install the software.

LOGGER PRO DOWNLOADS

Windows 10, 8, 7
Logger Pro 3.11 with sample movies (Windows)
Link: http://www.vernier.com/d/rxqyf
Password:

Mac OS X 10.11, 10.10, 10.9, 10.8
Logger Pro 3.11 with sample movies (Mac OS X)
Link: http://www.vernier.com/d/m9za1
Password:

Detailed Instructions
For more details on how to download and install Logger Pro, see:
http://www.vernier.com/til/2069/


FOR OLDER COMPUTERS

For Windows and Mac computers that are no longer receiving updates, you will need an older version of Logger Pro. If your version is not listed below, please contact us at support@vernier.com.

Windows XP and Vista
Link: http://www2.vernier.com/download/LoggerPro3_8_7.exe
Password:
Mac OS X 10.7
Link: http://www2.vernier.com/download/LoggerPro3_9.dmg
Password:

Mac OS X 10.6
Link: http://www2.vernier.com/download/LoggerPro3_8_7.dmg
Password: 

Review for AP Physics C Exam and Final

Here is a topically organized document with many example problems.
Big REVIEW    It is 26 pages so beware before you print them out.

Friday's (Tax day) Lesson & HW

Today we derived:

Equation for a Simple pendulum

and compared it to the Equation for a Physical Pendulum (still not dependent on mass)

We also reviewed AP 2004 mech 3  and the derivation of  I ( rotation inertia)  using integral Calculus.

Homework: New Quest: SHM& the Pendulum

Also   AP 2004 mech 3
Also   AP 2011 Mech3 torsional pendulum.

Park data

Some data collected by 3 of the groups

Park Phun

Wither thou wander?

Then Puck said:  "I go, I go; look how I go, Swifter than arrow from the Tartar's bow."

Here is the format and requirements for the Puck Lab.

"Then will two at once woo one; 
That must needs be sport alone;..." said the Puck

Happy New Year

Only 2 weeks of class ( 5 meetings or so) until Finals.

The Phinal will resemble a unit test in length but will be comprehensive for the 1st semester.

I posted 2 new Quest Assignments:

• Work and Energy 1

• 1st Semester Final Review

Take a look and dive in.