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    hkilgore's Avatar
    hkilgore Posts: 2, Reputation: 1
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    #1

    Apr 12, 2010, 08:50 PM
    How much does the barrel weigh?
    A 40 kilogram barrel is rolled up a 10 meter long ramp to a height of 5 meters. How much does the barrel weigh?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Apr 12, 2010, 09:04 PM

    Hint's the 10 and 5 are not needed.

    What's needed is this: Newton (unit) - Wikipedia, the free encyclopedia

    and F=ma; A is the acceleration due to gravity.

    While you could express the answer in newtons which would be correct unless someone wants the answer in lbs.

    It's confusing because lbs is a force not mass. The slug is the unit of mass in the English system.

    As it happens, your always seem to be converting incompatible units like a man weighs 150 lbs and in the medical community they will use kg. You have to assume that the 150 lbs is the force on earth.
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