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    lakeshia's Avatar
    lakeshia Posts: 3, Reputation: 1
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    #1

    Dec 18, 2007, 02:40 PM
    Final velocity
    A car starts from rest and travels for 6 seconds with a uniform acceleration of -2m/s. What is the final velocity?
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #2

    Dec 18, 2007, 02:41 PM
    Yep good and what do you think.
    Rather than simply copying your homework show us what you have tried so far.

    https://www.askmehelpdesk.com/math-s...-b-u-font.html
    lakeshia's Avatar
    lakeshia Posts: 3, Reputation: 1
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    #3

    Dec 18, 2007, 06:46 PM
    AS I worked it out I received -12m/s for the answer
    lakeshia's Avatar
    lakeshia Posts: 3, Reputation: 1
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    #4

    Dec 18, 2007, 06:46 PM
    -12m/s
    jiten55's Avatar
    jiten55 Posts: 105, Reputation: 8
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    #5

    Dec 18, 2007, 06:57 PM
    Formula is v = u + at

    V = final velocity

    u = initial velocity

    a = acceleration

    t = time
    itsme_vipsdude's Avatar
    itsme_vipsdude Posts: 29, Reputation: 0
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    #6

    Dec 18, 2007, 11:12 PM
    first of all a car cannot have acceleration of -2m/s^2 as it is starting from rest. So please check question
    oneguyinohio's Avatar
    oneguyinohio Posts: 1,302, Reputation: 196
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    #7

    Dec 18, 2007, 11:28 PM
    How could it have a negative acceleration if it is already at rest?
    itsme_vipsdude's Avatar
    itsme_vipsdude Posts: 29, Reputation: 0
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    #8

    Dec 18, 2007, 11:32 PM
    Yes dats what I asked
    jiten55's Avatar
    jiten55 Posts: 105, Reputation: 8
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    #9

    Dec 19, 2007, 04:59 AM
    Of course velocity can be negative! Speed cannot be negative but velocity and accelerations can be negative. It depends on which direction you consider positive.

    For example, if forward is positive, backward is negative and negative velocity means car moving backwards!
    oneguyinohio's Avatar
    oneguyinohio Posts: 1,302, Reputation: 196
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    #10

    Dec 19, 2007, 09:02 AM
    Semantics I suppose, with unclear nomenclature leading to supposition that negative velocity equates to slowing down as opposed to going backward
    itsme_vipsdude's Avatar
    itsme_vipsdude Posts: 29, Reputation: 0
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    #11

    Dec 19, 2007, 11:45 PM
    Yes I know that the velocity and acceleration can be negative but for information of you all, here the body is starting from rest... so pease check it out
    mudit's Avatar
    mudit Posts: 2, Reputation: 1
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    #12

    Dec 23, 2007, 11:45 PM
    OK man.. you say that negative velocity means moving back but when the body is moving then the force acting on it is also acting backwards so the car moves in the direction of force... so wt will u say it JITENJI
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