1D2

=Period 1: Defense Group 2= Caylin Iannotta, Tara Dubin, Stephen Bly, Yuma Tada

= EVIDENCE & CALCULATIONS: = - __situation__: - calculated information:
 * Driver of MV2 died in the car accident
 * he was traveling south on Mill Road- this is in the wrong direction since it is a one way street
 * two big red "Wrong Way" signs are present going in that direction
 * MV1 claims he was, "Traveling below the speed limit- no more than 30 mph"
 * MV1 was traveling west on Woodcliff Ave
 * MV2 swerved in front of MV1 as MV1 was turning right onto Mill Road
 * a car equipped with an EDR (event data recorded) says that before the collision the vehicle was traveling at 23.4 mph.
 * Skid marks from both cars are present
 * the cars stuck together (perfectly inelastic collision)
 * it was a sunny day, 57 degrees Fahrenheit
 * road is dry with traces of sand and dirt (insignificant)
 * There is a 5 degree slope westward on Mill Road
 * Crush Zone/ Crush Profile (whole thing) mix up- check to make sure proper terms are being used
 * **Exhibit A**:
 * Skid Mark Measurements:
 * MV2 (skid marks 1 & 2)
 * 1= 8.75 ft
 * 2=12.5 ft
 * MV1 (skid marks 3 & 4)
 * 3 = 14.38 ft
 * 4 = 8.75 ft
 * [[image:Picture_3.png width="378" height="139"]]
 * **Exhibit B:**
 * Crush Energy:
 * [[image:Picture_7.png width="408" height="404"]]
 * MV1= 61192.87252 Newton meters
 * ** *** [[image:cmi003.jpg width="509" height="701"]]
 * MV2= 56638.17691 Newton meters
 * [[image:cmi004.jpg width="764" height="1050"]]
 * **Exhibit C**:
 * Velocities:
 * Before Hitting the Breaks:
 * MV1:
 * on flat surface: 25.1527566 mph
 * on sloped surface: 24.37336182 mph
 * [[image:cmi005.jpg width="509" height="701"]]
 * MV2:
 * 27.03810274 mph --> speeding, heading in the wrong direction down Mill Road: the speed limit is 25 mph
 * [[image:cmi006.jpg height="701"]]
 * Ex hibit D**:
 * **Force:
 * MV1: 13,004 N
 * MV2: 8,169 N
 * [[image:Picture_6.png]]
 * Exhibit E**:
 * Work:
 * MV1: 56, 940 J
 * MV2: 31, 124 J
 * [[image:Picture_4.png]]
 * Exhibit F**:
 * Mu value = 0.71
 * Exhibit F**:
 * Mu value = 0.71

= = = Labs: =
 * [[file:reaction time lab]]
 * Drag Factor of a Car Tire Experiment

> > > > Mass of tire = 5.5 kg > Force of friction = 38 N > Acceleration due to gravity = 9.8 m/s2 > > > We found the force of friction between a tire and road to be .71. This seems right because the tire was difficult to pull. It would also a good amount of force to slow down something as heavy as a car.


 * ** === ** Measuring Crush Energy Experiment ** === **

Basic Information and Data used for each of three trials:

> > Constant Values: > Wheelbase of 1977 Ford Granada = 109.4 in. > A = 173 > B = 57 > > Equation for Crush Energy: CE = [A2/(2×B)](L) + A×C×L + (B×C2/2)(L) > > *IMPORTANT: THE INFORMATION GATHERED FROM THE CAN (WIDTH OF EACH CRUSH ZONE AND DEPTH OF INTRUSION OF EACH ZONE) HAS BEEN MULTIPLIED BY 30 TO COMPENSATE FOR THE DIFFERENCE BETWEEN A CAR AND A SODA CAN! > > Width of Each Crush Zone = L > Depth of Intrusion of Each Zone = C > > Curve 1 > Original Values: > L = 7/16 in. = 0.0364583 ft > C1 = 3/16 in. > C2 = 6/16 in. > C3 = 8/16 in. > C4 = 8/16 in. > C5 = 6/16 in. > C6 = 3/16 in. > C7 = 1/16 in. > > Scaled Values: > L = 0.0364583 ft x 30 = 1.093749 ft > C1 = 3/16 in. x 30 = 5.625 in. > C2 = 6/16 in. x 30 = 11.25 in. > C3 = 8/16 in. x 30 = 15 in. > C4 = 8/16 in. x 30 = 15 in. > C5 = 6/16 in. x 30 = 11.25 in. > C6 = 3/16 in. x 30 = 5.625 in. > C7 = 1/16 in x 30 = 1.875 in. > > Curve 2 > Original Values: > L = 7.75/16 in. = 0.0403646 ft > C1 = 2/16 in. > C2 = 6/16 in. > C3 = 8/16 in. > C4 = 6/16 in. > C5 = 5/16 in. > C6 = 3/16 in. > C7 = 2/16 in. > > Scaled Values: > L = 0.0403646 ft x 30 = 1.210938 ft > C1 = 2/16 in. x 30 = 3.75 in. > C2 = 6/16 in. x 30 = 11.25 in. > C3 = 8/16 in. x 30 = 15 in. > C4 = 6/16 in. x 30 = 11.25 in. > C5 = 5/16 in. x 30 = 9.375 in. > C6 = 3/16 in. x 30 = 5.625 in. > C7 = 2/16 in. x 30 = 3.75 in. > > Curve 3 > Original Values: > L = 8/16 in. = 0.0416666 ft > C1 = 2/16 in. > C2 = 4/16 in. > C3 = 6/16 in. > C4 = 8/16 in. > C5 = 8/16 in. > C6 = 5/16 in. > C7 = 3/16 in. > > Scaled Values: > L = 0.0416666 ft x 30 = 1.249998 ft > C1 = 2/16 in. x 30 = 3.75 in. > C2 = 4/16 in. x 30 = 7.5 in. > C3 = 6/16 in. x 30 = 11.25 in. > C4 = 8/16 in. x 30 = 15 in. > C5 = 8/16 in. x 30 = 15 in. > C6 = 5/16 in. x 30 = 9.375 in. > C7 = 3/16 in. x 30 = 5.625 in. > > Calculations and Final Result: > >  >  >  >  > Some of the calculations for the individual curves merely have the CE value stated without any work. This is because the Depth of Intrusion or C value for the specific zone matched a previously utilized C value of a different zone on the same curve. Since the C values matched and the rest of the equation also ended up being the same, the previously determined value was simply made equal to the CE value. > > Scan 5 contains the final result.

Pictures of site: Exhibit G:
Exhibit H : Exhibit I:

Exhibit J: Exhibit K: Exhibit L:

= Exhibit M:   = __Statement of MV1 Operator at the Scene of the Accident__ “I was going west on Woodcliff Ave. over the causeway of Woodcliff Lake. I was traveling below the speed limit – no more than 30 mph. I then made a right turn onto Mill Rd. All of a sudden this guy swerves in front of me and crashes into me. He was traveling south on Mill Rd. I didn’t realize what happened until the homeowner pulled me from the car”. Exhibit N: Examination of the point of impact between MV1 & MV2 clearly reveals a high-speed impact Exhibit O: MV1: Striking vehicle is a 2002 Subaru Forester Tag NJW 856 and VIN ALKJHYT092984534120. Vehicle color is gold. MV1 came to rest perpendicular to MV2 with the right front corner of MV1 pushed into the driver’s door of MV2. The crush zone is approximately 2-3 feet wide and a maximum depth of 1.5 feet. The front windshield was cracked. The right front passenger window was shattered. Blue transfer paint was visible on the right quarter panel and both passenger side doors. The right front tire was flat and its aluminum hub was cracked. All four tires were Goodyear Eagle GT 215/60R16. Tires appear to have normal wear. No other damage was visible.
 * __Post Crash__**
 * __Vehicles__**

MV2: Vehicle is a 2005 Ford Focus Tag NJS 935 and VINKUHJOL91827678942. Vehicle color is blue. The driver side of MV2 came to rest perpendicular to MV1. The driver’s door is crushed inward. The crush zone is approximately 3-4 feet wide and a maximum depth of 2 feet. The driver’s seat was displaced towards the passenger side of the vehicle. The driver who was deceased at the scene was not yet extricated from the vehicle at the time of these observations. It appears that the driver died as a result of blunt trauma due at the time of impact. The contents of a Thule Cargo box was strewn on the lawn in an area concentrated about ten feet beyond the rest position of MV2. All four tires were Kumho Kolus KR21 P195/60R15. Tires appear to have normal wear. No other damage was visible.

LOG: - April 18, 2010:
 * Caylin: worked on contract, ed head activity
 * Yuma: worked on contract, ed head activity
 * Tara: worked on contract, ed head activity

- April 20, 2010: - April 27, 2010: - **April 29 2010:**
 * All: edited more of the contract, finished going over ed head activity
 * **Yuma: Worked on and finished the** Measuring Reaction Time Experiment.
 * Caylin was absent but read over more of her ELVA that night to prepare for her testimon
 * **Tara and Steven: Started and finished the** Drag Factor of a Car Tire Experiment**.**
 * **Tara : Worked on and finished her** Reaction Time Lab**.**
 * Tara and Steven: Briefly began to analyze the actual crash scene during the second period of lab.
 * **Yuma: Finished up the** Measuring Crush Energy Experiment **and posted the data/information as well as the calculations and final result. The calculations and final result are posted as PDF files.**
 * The entire group will now focus all of the energy in analyzing the crash scene and coming up with a strong defense.

-** April 30, 2010: -May 1, 2010: -May 2, 2010:
 * Everyone began calculations to solve for case
 * Caylin: found pictures and analyzed the surrounding area
 * Yuma: worked on crush energy
 * Tara: began writing her opening statement
 * Steve: used the force
 * Yuma, Caylin, Tara: met to really organize all of the tasks, found "errors" in prosecutions evidence, began powerpoint
 * Steve was unable to join =(
 * Caylin: organized all of the data on wiki, took pictures of the site, evaluated the site

[|Weight of Car 2]