1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Collision Problem and Newton's 2nd Law

  1. Nov 9, 2006 #1
    How do car bumpers that collapse on impact help to protect a driver?

    According to the law of conservation of momentum, p = mv.
    Newton's 2nd Law is F = ma, or F = mv/t.
    So as t increases, F would decrease, thus less force would be acting on the car at a given time interval.

    Any suggestions and comments?:rolleyes:
  2. jcsd
  3. Nov 10, 2006 #2
    Yes, thats about it. You could also probably analyse it in terms of energy in the sense that the car bumper converts kinetic energy into elastic potential energy.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Collision Problem Newton's Date
Physics Word Problem: Arrow and moving target collision Saturday at 10:55 PM
Invariant mass problem, elastic collision Jan 20, 2018
Elastic Collision Problem Dec 26, 2017