B-2

__**Defense for Car Crash Scenario 2:**__ Matt Levy - Defense Lawyer Dan Hong - Expert Witness Alex Barnett - Police Witness/Driver 1 Mallory Harwood - Technical Assistant





Discussed trial ||
 * Daily Log-**
 * = **Date ** ||= **Progress** ||
 * 4/19 || Group Contract ||
 * 4/21 || Google Maps/pictures - organized group ||
 * 4/26 || Measurements/calculations - length of skid marks, drag factor, distances, coefficient of friction
 * 4/27 || Worked on labs - Measuring Crush Energy and Reaction Time Lab ||
 * 4/28 || Worked on fixing Crush Energy Lab ||
 * 4/29 || Calculations for velocity and car crash facts ||
 * 4/30 || Continued calculations for finding final velocity, worked on friction lab ||
 * 5/3 || Worked on powerpoint and evidence for trial ||
 * 5/4 || Revised calculations with work included, worked on opening/closing statements ||
 * 5/5 || Watched trial for scenario 1 and took notes as jury ||
 * 5/6 || Presented trial!!!! :) ||

4/19/10 - Group Contract

4/21/10 - Google Maps



4/26/10 - Measurements and Calculations

Speed Limits:

Mill Road: 25 mph Woodcliff Ave: 35 mph

Skid Marks: o MV1: Left- 14.375 feet Right- 8.75 feet o MV2: Left- 11.875 feet Right- 8.75 feet

Drag Factor: (Coefficient of Friction of Rubber on Asphalt) o 0.786

Feet from point of Impact: o Stopped 26.25 feet from the point of collision

4/27/10 - Crush Energy Lab

Objective - to estimate the crush energy from damage measurements on an aluminum soda can Materials - soda cans, meter stick, metal ball, ruler

Measurements and Data from Measuring Crush Energy Lab -

Mass = .066 kg
 * **CE = (A2/2B)(L) + ACL + (BC2/2)(L)** ||
 * L= width of each crush zone (feet) ||
 * C = the depth of intrusion of each crush zone (inches) ||
 * A and B are called crush constants that depend upon the car type ||
 * We split the crush into 4 different zones ||

Dropped height = .60482 m

Wheelbase = 109 inches A = 173 B = 57


 * Depth (inches) || Width (inches) ||
 * 1/4 || 1 ||
 * 9/16 || 1 ||
 * 10/16 || 1 ||
 * 5/16 || 3/4 ||

4/28/10 __Calculations__ -

CE = KE + PEg 145.65 = + mgh 145.65 = .5(.066)v^2 +(.066)(9.8)(.60482)


 * v = 66.57 m/s**

PEg = KE mgh = gh = 1/2v^2 9.8(.60482) = (1/2)(v^2)


 * v = 3.44 m/s**

Percent Error - __3.44 - 66.57__ (100) 3.44
 * = 1,835.17 %**

In this lab, our team found out that we had to factor in the energy due to the crush. By experimenting on the soda can, measuring the different crush zones, we were able to use this concept to find the total crush energy in the car accident and determine any reckless driving.
 * Conclusion**:

4/29/10

__Exhibit 1: Initial Velocity car 2:__ a=Mg =(0.786)(32.2ft/sec) a=25.3092 ft/sec^2 d=11.25

vf=23.4mph

23.4mph* 5280ft/mi * 1hour/3600feet = 34.32 ft vi2= √vf^2+2ad vi2= √34.32^2 +2(25.3092)(11.25) vi2= 41.8 feet/sec

41.8 ft/sec * 1 mi/5280ft *3600 sec/hour = 28.5 mph

__Exhibit 2: Coefficient of Friction on Asphalt:__



__Exhibit 3 - Safety of Ford Focus:__ http://www.carfax.com/car_safety/ratings/SRR.cfm/year/2005/make/FORD/model/FOCUS/trim_id/2005FORD3PFFOCUS_ZX3#SARcrashtestresults details show side crash test only got a 3 star rating - worst of all sides, also shows a "worse than average" injury index

__Exhibit 4 - Crush Energy Car 1:__ Ce = (A^2/(2B)*L + ACL + (BC^2/2)*L A = 173; B = 57; L = 12; C1 = 8; C2 = 18; C3 = 20; C4 = 12; C5 = 9

Ce total = 501290.1053 lb *ft = 676741.64 N*m

Exhibit 7 - data for Ce total:



Info from Opening Statement -

"For instance, you could have a ticket for driving the wrong way down a one way roadway and one for reckless driving. Each will have its own penalty involved." -In NJ, driving the wrong way down a one-way road results in 2 to 4 points (usually 2 for driving the wrong way and 2 for careless driving) -In NJ, driving 1-14 mph over the speed limit results in 2 points on one's license

Plaintiff's Traffic Violations -- 39:4-85.1 - Wrong way on one-way street - 2 points 39:4-97 - Careless driving - 2 points Total: 4 points

Defendant's Traffic Violations -- 39:4-98 - Speeding up to 14 mph above limit - 2 points (Defendant was going 12 mph above speed limit) Total: 2 points

WORD DOCUMENT OF OPENING AND CLOSING STATEMENT



Links Used: http://maps.google.com/ http://www.trafficviolationlawfirms.com/resources/traffic-tickets/moving-violations/driving-wrong-way-down-one-way-roadway.htm http://docs.google.com/viewer?a=v&q=cache:i-rIh-zrlMwJ:www.sailelaw.com/pdf/sailelaw_njdrivingpts.pdf+nj+law+39:4-99&hl=en&gl=us&pid=bl&srcid=ADGEESh6a8QUnh7u69atSTaEiVtKImQFttfIvnga0zN4b8bCkaCNVTC1kS4je9UYgCDgtaKYiAB5lHqEcpFWmVKpQ6NtIgb2c1jPaekoLPuW3E1yGTvmpRXg0PgDygqyyaQI61JGTwiM&sig=AHIEtbRjQGLOPY5hTlI_KALv1tjA2c3vGg