Physics

A person weighs 150 pounds. He is standing on a scale in an elevator and stands on a scale. The elevator is accelerating upwards at a rate of 10 m/s/s, what is the reading of the scale?

150 pounds

about 75 pounds

about 300 pounds

not enough info

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  1. Would it be 300 pounds?

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  2. F = m a

    150 lbs = 68 kg


    Fscale up - m g down = m a

    Fscale up = m g + m a

    = 150 pounds + 68* 10 newtons

    = 150 pounds + 680 Newtons

    680 Newtons = 153 pounds

    so 150 + 153 is about 300 pounds

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    posted by Damon

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