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

    Sep 17, 2016, 08:24 PM
    Physics
    A car accelerates from rest at 2.2 m/s2.How much time does it need to attain aspeed of 8 m/s?Answer in units of s.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Sep 17, 2016, 08:36 PM
    Please read about posting homework. Show us your work, where you are stumped and then we can help.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Sep 19, 2016, 09:06 AM
    You need to memorize a few key concepts, such as the definition of acceleration, which equals change in velocity per unit time. Here you know the change in velocity and the acceleration - now calculate the time required.
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