A-1

=**Prosecution for Car Crash Scenario One: **= Sarah Kerin Brad Barton Jonathan Brizzolara Dan Rosen **
 * __Group Members:__

__Crash Overview:__ [|MV Intersection Crash 1.doc]

__Contract:__ [|DanBradJonSarahContract.doc]

=Measuring Crush Energy Lab=

__** Objective **__: Estimate the crush energy from damage measurements on an aluminum soda can. The can will serve as an approximate model of an automobile.


 * Hypothesis **: The crush energy will be equal to the initial kinetic energy and the initial potential energy of the ball.

1. Gather materials 2. Find the mass of the can 3. Measure height of the can 4. Drop the ball onto the can from 1m height 5. Take a normal can and trace on paper 6. Trace the crushed can on the same paper 7. Divide the crush into different zones 8. Determine the width and depth of each zone 9. Find crush energies of each 10. Add the energies to get the total crush energy 11. Set the crush energy equal to KE (1/2mv^2) and find velocity
 * Procedure **:


 * [[image:Rosen_Crush_Lab.png width="1057" height="113" caption="Crush Lab Data Table"]] ||

**Coefficient of Friction Lab**

Objective: finding the coefficient of friction of rubber on asphalt. Hypothesis:the coefficient of friction in this lab would be similar to the co efficient of friction shown by the Fatal Accident Investigators' accelerometer.

Procedure: 1. mass the board and rubber 2. place rubber side down and pull with force meter. 3. add masses in .5 kg increments. 4. record data, and set up a graph.




 * = Date ||= Accomplishments ||
 * 4/19 || Completed contract, reviewed scenario and began discussing, uploaded crash scene photos ||
 * 4/20 || Crash reconstruction and analysis ||
 * 4/21 || We organized our group and became prepared for the next few days. ||
 * 4/22 || Learned calculations for Glancing collisions ||
 * 4/23 || Calculated theoretical equations for initial velocity and drag coefficient ||
 * 4/26 || Worked on the case. Found possibilities for the cause of the accident. Calculations done ||
 * 4/27 || Did some labs. Calculated crush energy and reaction time. ||
 * 4/28 || Calculating data for the crash. Prepare evidence and various tools for presentation. ||
 * 4/29 || Found good arguments, used drag factor calculator ||
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;">4/30 ||  ||
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;">5/03 ||  ||
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;">5/04 ||  ||

Wheelbase MV1 = 105.5 Wheelbase MV2 = 106.2

Exhibit 1A

Weather from weather.com on April 11, 2010
 * [[image:Weather_Hillsdale.png caption="Weather In Hillsdale"]] ||

Exhibit 1B

[|http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=KNJEMERS3&month=4&day=11&year=2010]
 * This link provides another source of weather for small time intervals on April 11, 2010**

http://consumerguideauto.howstuffworks.com/2005-to-2009-honda-civic-2.htm

Exhibit 2
 * [[image:Nami_James_Jerry_diagram.png caption="Diagram"]] ||

Length of MV1 Skid Marks: **51 ft** Distance of Cars from Impact point: **40 ft** Angle of Collision **: 48º** Mass of MV1: 1440 kg **= 3174.7 lbs** Mass of MV2**: 1304 kg = 2874.8 lbs** Coefficient of friction: **.85**

__Crash Scene Photographs (Multiple Perspectives)__**
 * || [[image:Site_of_Crash_P1.png height="328" caption="Site of Crash (Exhibit 3A)"]] ||


 * [[image:Oncoming_Kinder.png height="325" caption="Oncoming view Kinderkamack (Exhibit 3B)"]] ||


 * [[image:Oncoming_Pier.png height="330" caption="Oncoming Piermont (Exhibit 3C)"]] ||


 * [[image:Speed_Pier.png height="355" caption="35 mph Piermont Speed Limit (Exhibit 4A)"]] ||