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    Fishhead96's Avatar
    Fishhead96 Posts: 1, Reputation: 1
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    #1

    Feb 11, 2014, 11:22 PM
    Need a physics problem answered
    How fast does a 4000 lb vehicle need to travel in order to propel/move a 256 lb object 69ft after striking it?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Feb 12, 2014, 05:45 AM
    Not enough info provided - what type of surface is this on? If on ice, the 4000 pound vehicle need barely be moving at all. I have to wonder if you are asking about a car striking a person - if so, the police have empirical models for estimating such things.
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