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!

Dissipation of Energy

  1. Oct 29, 2009 #1
    I am struggling to calculate the required resistance of a single seater race cars nosecone in the event of a head on collision to the nosecone.

    The data I have been given is:

    Mass of car: 300kg
    Velocity at impact: 7ms^-1
    Impacting to a non-yielding barrier
    Length of nosecone 0.3m
    Peak deceleration no more than 40g (392.4 ms^-2)
    Average deceleration no more than 20g (196.2 ms^-2)

    If anyone could provide me with the equations required to find these figures i would be greatly appreciative.

    Thanks

    Rick
     
  2. jcsd
  3. Oct 29, 2009 #2
    as I believe, using the SUVAT equations

    s=0.3m
    v=0.0ms^-1
    u=7.0ms^-1
    a is unknown
    t is unknown
    p=2100 kgms^-1

    using v^2=u^2+2as

    I can obtain

    0=49+0.6a

    giving

    a=-81.67ms^-2

    then

    F=ma

    F=300*81.67

    so

    F=24498 N

    But I'm stuck from this point
     
    Last edited: Oct 29, 2009
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook