What is Car accident: Definition and 65 Discussions

A traffic collision, also called a motor vehicle collision, car accident, or car crash, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other stationary obstruction, such as a tree, pole or building. Traffic collisions often result in injury, disability, death, and property damage as well as financial costs to both society and the individuals involved. Road transport is the most dangerous situation people deal with on a daily basis, but casualty figures from such incidents attract less media attention than other, less frequent types of tragedy.A number of factors contribute to the risk of collisions, including vehicle design, speed of operation, road design, weather, road environment, driving skills, impairment due to alcohol or drugs, and behavior, notably aggressive driving, distracted driving, speeding and street racing.
In 2013, 54 million people worldwide sustained injuries from traffic collisions. This resulted in 1.4 million deaths in 2013, up from 1.1 million deaths in 1990. About 68,000 of these occurred in children less than five years old. Almost all high-income countries have decreasing death rates, while the majority of low-income countries have increasing death rates due to traffic collisions. Middle-income countries have the highest rate with 20 deaths per 100,000 inhabitants, accounting for 80% of all road fatalities with 52% of all vehicles. While the death rate in Africa is the highest (24.1 per 100,000 inhabitants), the lowest rate is to be found in Europe (10.3 per 100,000 inhabitants).

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  1. K

    Velocity of Head from Car Accident

    My friend was in a head-on collision this week. They were traveling approximately 35 mph. A car collided with them head-on traveling at approximately 30 mph. The airbag deployed, and the impact caused a tremendous contusion on my friend's forehead, but no skull fractures. It's been years since...
  2. T

    Calculating Speed of T-Bone Car Accident

    Hello, I am not a big math guy, although I do have a bachelors degree I don't remember any of my formulas from high school lol. I was involved in a car accident and I am researching the physics of the accident. I want to try and approximate the speed of the vehicle that hit me broad...
  3. K

    How Is Coefficient of Restitution Used in Car Accident Reconstruction?

    My physics professor gave us a lab in which we have to do accident reconstruction. The difficulty I am having is that we have not gone over how to calculate collision with coefficients of restitution in class. So far we've only done completely elastic or inelastic, yet now he expects us to do...
  4. Z

    Uncovering the Truth: Analysis of a Mysterious Car Accident on the Highway

    I was in a car accident involving an eighteen-wheel truck. The driver thinks the truck hit the car. I was in the passenger seat and I think the car hit the truck. Can someone give their opinion given the details: The car was traveling in the left lane at about 70 miles on the highway. The...
  5. P

    Proving Speeding in Car Accident with Physics

    ok so i have a question I'm really hoping someone can help me with. i got in a car accident recently and i want to prove that the person who hit me was speeding but I'm not sure how to do it. i am actually an engineer so i really should be able to do this on my own but I'm a civil engineer and...
  6. B

    [attempt?] car accident problem.

    [SOLVED] [attempt?] car accident problem. Homework Statement http://hypertextbook.com/physics/mechanics/momentum-two-three/accident-reconstruction-1.pdf Homework Equations Pix=Pfx Piy=Pfy v^2 = v0^2 + 2 ax Fk=MkN W=mg F=ma The Attempt at a Solution 01. Fk = MkN 100 N = Mk...
  7. D

    Solving a Drunk Driver's Collision Problem

    Hey, I was wondering if anyone could help me with this problem: You are the juror of a case involving a drunken driver whose 1026.0 kg sports car ran into a stationary 1913.0 kg station wagon stopped at a red traffic light. The cars stuck together and slid with locked wheels for 12.0 m before...
  8. M

    Conserved momentum (car accident)

    Homework Statement A blue car with a mass of 2000 kg and a yellow truck with mass 9000 kg enter an intersection. The truck comes from the south at vtruck = 7 m/s, and the car comes from the west. When the two collide they stick together and slide at an angle of q = 43° north of east. What...
  9. I

    Will a Fly Survive a Car Accident?

    Would a fly traveling in a car that hits a brick wall be killed? Windows closed, fly around the middle of the car.. aircon off :P Im thinking that the fly would lose enough momentum before it hits the front window or dashboard to survive.. :D
  10. A

    How Do You Calculate the Velocity of Two Colliding Cars That Stick Together?

    Please help. Consider the following two-car accident: Two cars of equal mass m collide at an intersection. Driver E was traveling eastward, and driver N, northward. After the collision, the two cars remain joined together and slide, with locked wheels, before coming to rest. Police on the...
  11. G

    Almost died in car accident today

    Hey all, just thought I would share my harrowing near-experience with death I went through just a few hours ago. I was driving my vette from LA back to my house in San Jose today on 101 (driving insanely fast of course, stupid of me) when I came up on a two lane stretch that seemed pretty empty...
  12. S

    Car Accident After Moped Impact: Seeking Advice

    im new here and found your forum after using google i have a question relateing to a car accident after getting hit by a moped as the insurance company feels that the force could not have caused any damage hopefully someone here can help as it seems a very good forum. my wife was driving her...
  13. H

    Calculating Car Accident Speed: 100ft skid marks, 0.75g deceleration

    Homework Statement Investigating the scene of a car accident you measure the skid marks of one of the cars to be 100.0ft long. Assuming that the maximum deceleration on dry pavement is 0.75g, what was the minimum speed of the car(in mph) when it slammed on the brakes? Homework Equations...
  14. D

    Car Accident: Need Assistance Please

    Hi there! I am in need of assistance, please. My son was involved in a car accident, in which there was an obstacle in the road that caused traffic to suddenly stop, unexpectedly. He (from what he tells me) was paying attention and was slowed almost to a stop, when he was struck from behind...
  15. A

    Inelastic Collision with Friction in car accident

    Homework Statement You are called as an expert witness to analyze the following auto accident: Car B, of mass 2100 kg, was stopped at a red light when it was hit from behind by car A, of mass 1400 kg. The cars locked bumpers during the collision and slid to a stop. Measurements of the skid...
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