A collision analyst applies physics principles to reconstruct what happened at automobile crashes. Assume that during a head-on crash between two cars, the cars came to a stop, and a large component of a plastic bumper broke off one car and skidded along the highway shoulder leaving skid marks. What information could the analyst gather from the bumper component and from the skid marks it produced? What measurements would be needed to estimate the speed of the cars just before the collision, and how would they be used? Find out more about how traffic collision analysts apply physics and math in their investigations using the Internet or other suitable publications. Report your findings in a paper, highlighting connections with momentum. Traffic Collisions and Reaction Time http://www.phy.ntnu.edu.tw/java/carDistance/carAccident.html Applet that lets you change reaction time of drivers, car speed, and distance between cars. National Crash Analysis Centre http://www.ncac.gwu.edu/ The FHWA/NHTSA National Crash Analysis Centrehttp://www.ncac.gwu.edu/ is a federally funded research centre concentrating on vehicle crash research. Follow the links below for more information Accident Reconstruction Calculator Homepage http://www.reconstructionist.com/index.php?option=com_content&task=view&id=27&Itemid=39 Software that allows you to reconstruct automobile collisions.