Perception experiment need help any kind of help even if its a starter!?

Janna Mills

New member
HELP PLEASE!!!
The incident: On October 15th 2007 at approximately 12:17 AM, a 40 year old male with perfect 20/20 uncorrected vision was driving home from his 8 hour shift at a manufacturing plant. The 40 year old male (Rick) was on a rural two lane country road and was moving along at approximately 55 mph (55 mph * 1.466 = 80.63 fps). A 35 year old female (Diane) wearing a white t-shirt and blue jeans with black shoes was walking on the side of the rural road moving in the same direction and in the same lane as Rick. According to Rick, he never saw Diane until it was too late and wasn't able to apply his brakes until he noticed Diane. The skids marks only started approximately 10 feet before the presumed location where Diane was struck.
Evidence
Rick's vehicle was analyzed by investigators and the following was found: The truck is a 2006 Toyota pick-up truck with working head and tail lights, working / good condition tires, working / good condition brakes. Analysis of the tires indicated a severe temperature increase consistent with braking due to road speckling (gravel melts into tire). The evidence suggest at some point prior to the police officer arriving at the scene that the brakes of the vehicle were applied with 100% braking (brake pedal mashed to the floor).
Rick's cell phone was analyzed by investigators and the following was found: Cell phone records indicated Rick had made a phone call that ended approximately 20 minutes before the estimated time of impact. The internet log, text log, and phone log indicated Rick was not using his phone during the time of impact.
Rick's wife and friends were questioned about his sleep and drug usage: All interviews suggest that Rick does not drinking or using drugs and hasn't had an alcohol beverage since the weekend (4 days before the time of accident). Rick's wife states that Rick had a full 9 hours of sleep the day before and should have been well rested.
A Sun and Moon analysis was conducted using a US Navy Database: Analysis suggest that the moon was not out during the time of the accident. This means the only lighting in the immediate area was from Rick's headlights.
A Lighting analysis was conducted of the area of the accident: Analysis suggest the closest light to the accident is approximately 2,268 feet from the estimated point of impact. This light was a standard street light. By all accounts, this light couldn't have illuminated the area of impact.
Ricks at scene report: "I was driving along and she came out of no where. Before I could even hit the brakes I knew it was too late. I still remember the shocked look on her face. I didn't expect anyone to be walking along that dark road. I guess the time of impact was around midnight as I had just finished listening to a report on the radio that stated the time. I was driving the speed limit of 55 just like I always do because I never speed. I didn't have nothing to drink tonight and I'm not on any medication. Once I hit her I pulled over to the side of the road and then called 911. It must have been 15 minutes or so before the ambulance showed up and took her away. When they left the seen she was still breathing".
Diane's report at the hospital: "I was walking along that road because my car broke down. I was the only person out there and that car should have seen me. I even waived my arms at one point to get the drivers attention. I don't know why he didn't slow down and I was kind of shocked right up until the point that he hit me because I was wearing a white shirt that should have made me visible. I even removed my dark sweater thinking that a white shirt would keep me safe on the side of the road. The doctors tell me I'm going to lose my leg and I'll need some major hip surgery". I couldn't walk in the grass because my ankle is sore because I have some arthritis from an injury when I was a kid". I also wanted that car to see me and stop so I kinda moved into the road a bit to get his attention.
You need to prepare a brief bringing in the following items (Explain it like you are talking to a jury
1. Describe how light reflects off a surface. What are some terms a jury should know?
2. Describe Perception Reaction Time. What is this and what should a jury know?
3. Describe how far Rick would have traveled from the time he notices Diane to the time he hits the brakes. Provide an estimate for the total time.. starting from when Rick sees Diane to the point when he first touches the brake pedal with his foot. Estimate how far Rick would travel from the point he sees Diane to point he touches the brake pedal with his foot. Try and find the distance that headlights thrrow light.
4. Estimate how long in time it would take Rick to stop once he applies the brakes. Estimate how far Rick would travel once he applies the brakes.
5. Present some research on different pedestrian garment types such as retro re
ADDITIONAL QUESTION AND i DID THE MATH AS WELL:

6. Form an opinion as to whether the average person could have avoided this accident based off of the evidence you've gathered. Who do we assign blame to?

fps = feet per second

fps = 1.466 * mph

mph = miles per hour

mph = fps / 1.466

prt = perception reaction time (time it takes to perceive and react)

hint: google perception reaction time and choose a time (but choose wisely!)

BD = Braking Distance

forumla: Braking Distance = (Speed 2 ) / (30* f)

f = drag factor (f value for this road was .5)

example:

Speed of vehicle was 60 mph

f = .5

Braking Distance = (60 2 ) / (30 * .5)

Braking Distance = (3600) / 15

Braking Distance = 240 feet

It takes a vehicle traveling 60 mph approximately 240 feet to come to a complete stop (assuming 100% braking).

THANK YOU IN ADVANCE
 
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