Mr. Rogers' AP Physics C: Mechanics (With IB Physics Topics) Objectives 

Syllabus  1st Quarter  2nd Quarter  3rd Quarter  4th Quarter 
AP Review  Investigations  Internal assessment 
Physics Investigations
The month of May following the AP test will be entirely spent performing handson physics experiments to answer the essential question shown below:
Essential Question: Do the mathematical models and principles of physics actually work? 
The investigations selected below are intended to help meet the IB internal assessment standards.
Investigation 1: Frequency vs length of a simple pendulum 
IB Standard: 
Purpose: Determine if the pendulum equation can predictive frequency 
Instructions: Collect frequency data for pendulums of various lengths. 
Equipment: String, Washers, tape measure, timer 
Safety: 
Deliverables: An Excel spread sheet with the data for each pendulum length along with the predicted frequency (use a spread sheet formula) in a table. Three Excel graphs: 1) shows a plot of frequency vs. length with an appropriate regression equation and an Rsquared value, 2) shows a plot of frequency squared vs. 1/length with an appropriate regression equation and an Rsquared value, 3) shows a plot of measured frequency vs. predicted frequency with an appropriate regression equation and an Rsquared value, 
Investigation 2: Measurement of g with a simple pendulum 
IB Standard: 
Purpose: Measure g with a simple pendulum 
Instructions: Devise a statistically significant method of measuring g using a pendulum. Create a 95% confidence interval for g. 
Equipment: String, Washers, tape measure, timer 
Safety: 
Deliverables: An Excel spread sheet with the data required to obtain a 95% confidence interval for g. 
Investigation 3: Estimate the friction force acting on an air track 
IB Standard: 2.3 
Purpose: Determine how close an air track comes to providing zero friction force. 
Instructions: Devise a statistically significant method of measuring the friction force on an air track. Create a 95% confidence interval for the force. Keep in mind that in a friction free environment, a slider on an inclined air track would bounce back to the same height. In the real world, it will not because friction does work that converts some of the system's mechanical energy into heat. 
Equipment: Air track 
Safety: Air tracks appear robust but are relatively delicate. Do not slam the sliders into each other. Be careful not to dop or ding either the track or the sliders. 
Deliverables: An Excel spread sheet with the data required to obtain a 95% confidence interval for friction force. 
Investigation 4: Conservation of momentum an air track 
IB Standard: 
Purpose: Determine if momentum is conserved during a collision of two sliders of equal mass on an air track. 
Instructions: Devise a statistically significant method for verifying conservation of momentum using an air track and sliders of equal mass. 
Equipment: Air track, two photogates, computer equipped for Vernier sensors, tape measure. 
Safety: Air tracks appear robust but are relatively delicate. Do not slam the sliders into each other. Be careful not to drop or ding either the track or the sliders. 
Deliverables: An Excel spread use for calculating velocities showing the % difference between the before and after velocities for several trials. (Note: before and after velocities are sufficient for verifying conservation of momentum because the two sliders have equal mass.) 
Investigation 5: Video measurement of g 
IB Standard: 
Purpose: Measure g using web camera video of a dropped object. 
Instructions: Devise a statistically significant method of measuring g using web camera video of a dropped object. 
Equipment: Falling object (select one that does not bounce), web camera on a computer, 8ft rod marked for measurement 
Safety: The falling object should be selected with care in order to prevent damage to the floor or injuries to people. 
Deliverables: An excel spread sheet showing all relevant data including a plot of displacement verses time with a quadratic regression equation and a graph of transformed data with a linear equation. (Rsquared values are to be on all graphs.) Determine g from both equations and calculate a % difference from the accepted value of 9.8 m/s^2 for both estimates. 
Investigation 6: Human reaction time 
IB Standard: 
Purpose: Determine why it is essentially impossible to catch a dollar bill dropped between the fingers when the image of Washington is aligned with the fingers just before the drop. 
Instructions: Devise a means of measuring human reaction time to an object dropped between the fingers. List the reaction time (average of 4 measurements for each student) of all the students in the class and create a 95% confidence interval for it. 
Equipment: to be determined by the student. 
Safety: 
Deliverables: An Excel spread sheet with all data and calculations. Also include a one answer to the purpose. 
Investigation 7: Investigation of TickleMeCookie Monster mechanism 
IB Standard: 
Purpose: Determine what makes the TickleMeCookie Monster's stomach vibrate when he laughs. 
Instructions: Devise a procedure for characterizing cookie monster's vibration using the specified equipment shown below. Form a hypothesis about the mechanism causing it. Dissect the doll and determine if your hypothesis is correct. TickleMeCookie Monster must be reassembled and work properly after the investigation. 
Equipment: a TickleMeCookie Monster, Vernier LabPro, associated software, computer (on red carts), and microphone 
Safety: 
Deliverables: A word document
containing the following:

Investigation 8: Measurement of the speed of sound in aluminum 
IB Standard: 
Purpose: Measure the speed of sound in an aluminum rod. 
Instructions: Devise a procedure for measuring the speed of sound in a rod by making it resonate and measuring the resonant frequency. 
Equipment: An aluminum rod, Vernier LabPro, associated software, computer (on red carts), and microphone 
Safety: 
Deliverables: A word document
containing the following:

SAM TeamSouthside High School's STEM and Computer Science extracurricular club (Mr. Rogers Sponsor) Mr. Rogers Information for Teachers Mr. Rogers Science Fair Information Check out other web sites created by Mr. R: Check out Articles by Mr. Rogers: 

Mr. Rogers Home  Common Sylabus  AP Comp Sci I  AP Comp Sci II  AP Physics Mech  AP Physics E&M  AP Statistics  Honors PhysicsIB Design Tech  Southside