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Thread: help with this physics question?

  1. #1 help with this physics question? 
    New Member
    Join Date
    Apr 2009
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    1
    At the bottom of a ramp, Brad hits a patch of loose gravel and wipes out. Kirsten applies her brakes quickly to avoid hitting him. She is travelling at 6.5m/s when she applies her brakes and she accelerates at -2.6m/s^2. How long (time) does it take her to stop?

    Please use the
    G
    U
    E
    S
    S
    S
    method for this!
    pleeease.


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  3. #2  
    Forum Radioactive Isotope MagiMaster's Avatar
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    Jul 2006
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    3,440
    If this is a homework question (and I'd be surprised if it wasn't, the way you've presented it), we cannot answer it for you. Instead, if you can show what work you've done and/or ask more specific questions, we can at least give you hints or point out where you've gone wrong.


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  4. #3  
    Forum Masters Degree organic god's Avatar
    Join Date
    Feb 2008
    Location
    London
    Posts
    567
    i'm not sure what the Guesss method is, so i will use the Suvat way of displaying it

    u=6.5
    v=0
    a=-2.6
    t=?
    s= -

    simple application of an equation of motion will give you the answer

    v = u + at

    rearrange
    t = (v-u)/a
    everything is mathematical.
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