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.