Posted by Hannah on Monday, May 28, 2012 at 4:23pm.
A 79.2kg 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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