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31 December, 04:53

A 76-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 840 N. What is the acceleration of the elevator? 1.25 Correct: Your answer is correct. m/s2 upward

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  1. 31 December, 06:32
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    1.25 m/s^2

    Explanation:

    m = 76 kg, R = 840 N

    Let a be the acceleration of teh elevator in upward direction.

    By use of Newton's second law

    R - mg = m a

    R = m (g + a)

    840 = 76 (9.8 + a)

    a = 1.25 m/s^2
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