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The problem reads: A 75-kg person steps onto an elevator with a scale. What does the scale read when the elevator (a) is at rest, (b) climbing at 3.0m/s, (c) falling at 3.0m/s, (d) accelerating upward at 3.0m/s^2, and (e) falling downward at 3.0m/s^2?

This is the work I've done so far:

(a) 75kg

(b) Would it be correct to assume that a=0 thus F=0 (F=ma), which means Fscale=mg? Would the scale read 75kg then?

(c) *same assumption as above*

(d) If F=ma, then Fscale-mg=ma (up as positive). Thus m=Fscale/a+g. So then I just plug in the numbers (Fscale=75kgx9.8m/s^2)

(e) *same as above*

Err... or am I just completely out of the zone?