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    simmon's Avatar
    simmon Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Feb 20, 2009, 02:49 AM
    Law of motion
    Two cars approach each other; both cars are
    Moving westward, one at 70 km/h, the other
    At 63 km/h.
    What is the magnitude of the velocity of the
    First car relative to (in the frame of reference
    Of) the second car? Answer in units of km/h.
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Feb 20, 2009, 02:26 PM

    Could it possibly be 70 - 63?
    Shelesh's Avatar
    Shelesh Posts: 55, Reputation: 4
    Junior Member
    		  
    #3

    Feb 23, 2009, 10:43 AM

    Well.. I guess the question means 'as seen by the second car'...
    Shelesh's Avatar
    Shelesh Posts: 55, Reputation: 4
    Junior Member
    		  
    #4

    Feb 23, 2009, 10:45 AM

    I would say 7 km/h...
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