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Math Help - Physics: Motion in One Dimension Please Help

  1. #1
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    Physics: Motion in One Dimension Please Help

    (a) Sand dunes on a desert island move as sand is swept up the windward side to settle in the leeward side. Such "walking" dunes have been known to travel 24 feet in a year and can travel as much as 105 feet per year in particularly windy times. Calculate the average speed in each case in m/s.

    (b) Fingernails grow at the rate of drifting continents, about 10mm/yr. Approximately how long did it take for North America to separate from Europe, a distance of about 3540 miles?
    Note I would also like to see the problems solved as opposed to only the answers. Thanks a bunch.
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    Re: Physics: Motion in One Dimension Please Help

    Quote Originally Posted by Monet View Post
    (a) Sand dunes on a desert island move as sand is swept up the windward side to settle in the leeward side. Such "walking" dunes have been known to travel 24 feet in a year and can travel as much as 105 feet per year in particularly windy times. Calculate the average speed in each case in m/s.

    (b) Fingernails grow at the rate of drifting continents, about 10mm/yr. Approximately how long did it take for North America to separate from Europe, a distance of about 3540 miles?
    Note I would also like to see the problems solved as opposed to only the answers. Thanks a bunch.
    (a) avg \, speed = \frac{total \, distance}{total \, time}

    to start, you need to convert ft to meters and a year to seconds

    (b) total \, time = \frac{total \, distance}{avg \, speed}

    you'll need to convert 3540 miles to millimeters

    in future, post physics topics in the math topics forum
    Last edited by skeeter; June 14th 2012 at 05:59 AM.
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