Posted by **Hannah** on Monday, May 28, 2012 at 4:23pm.

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) -
**Elena**, Monday, May 28, 2012 at 6:11pm
(a) ma = - mg + N

N = ma+mg

(b) 0= - mg + N

N =mg.

(c) -ma = - mg + N

N =mg - ma

- Physics(Please respond) -
**Hannah**, Monday, May 28, 2012 at 6:35pm
so is 79.2 kg the value for mass(m) or mg?

- Physics(Please respond) -
**Elena**, Tuesday, May 29, 2012 at 5:14am
Mass [s meeasured in kg.

Force (mg) - in Newtons.

m = 79.2 kg

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