Jump to content
Sign in to follow this  
Guest soccergirl13

Car Crash Webquest Challenge

Recommended Posts

Guest soccergirl13

A traffic accident occurred in a 35 km/hr speed limit area on Millway Street in which a 3000-kg Cadillac Escalade SUV rear-ended a 2000-kg Subaru Outback Wagon that was stopped at a stop sign. The Subaru traveled forward with a distance of 24 meters, the Escalade only traveled 2 meters. We found this information from the skid marks that were left by both the SUV and the wagon. With the amount of distance that was covered by the wagon after the collision, we can assume that the SUV had to be going pretty fast to make the wagon move 24 meters. We calculated the speed of the SUV to be about 39 km/hr, which is 4km/hr over the speed limit. The driver denies that he was speeding but the evidence and calculations say otherwise. We found this information from the skid marks that were left by both the SUV and the wagon.

By doing a few calculations we found the velocity (speed) of the SUV which was 10.83 m/s which is equal to 38.9 km/hr. The speed of wagon was 0 m/s because it was stopped at a stop sign or in other words it was at rest. The calculation of the speeds were done with a momentum chart, which is the momentum before in kg(m/s) and the momentum after in kg(m/s). The momentum of the SUV immediately before the collision was 32,490 kg(m/s) and the momentum of the wagon was 0 because it was at rest.

Kinematic equations were used to figure out what the velocity of both the SUV and the wagon were immediately following the collision. We used the equation vf^2 = vi^2+2ad, which is the final velocity squared = initial velocity squared plus two times the acceleration and distance. We determined the initial velocity to be 2.83 m/s for the SUV and 12 m/s for the wagon. With this information we were able to find out the momentum of both the vehicles immediately following the collision. We used the equation for momentum which is p=mv this means the momentum is equal to mass times the velocity. The mass of the SUV times the velocity which was found in the previous problem gave it a momentum of 8490 kg (meters/second).

This concludes that in fact the driver of the SUV was without a reasonable doubt speeding over 35 km/hr and slammed into the back of the wagon driven by an old woman, who is now eligible to sue the driver of the SUV for her injuries acquired by the accident. Including the fact that the driver of the SUV did lie about whether he was speeding or not.

Developed by: Julia and Madison:victorious:

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

×
×
  • Create New...