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March 26, 2017

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A 79.2-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.92 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.89 m/s2


I was going to use the equation
FN = mg + ma in which we are given a and mg but I was not sure what to use for m.

  • Physics(Please respond) - ,

    (a) ma = - mg + N
    N = ma+mg

    (b) 0= - mg + N
    N =mg.

    (c) -ma = - mg + N
    N =mg - ma

  • Physics(Please respond) - ,

    so is 79.2 kg the value for mass(m) or mg?

  • Physics(Please respond) - ,

    Mass [s meeasured in kg.
    Force (mg) - in Newtons.
    m = 79.2 kg

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