Physics - NLM Question with Solution | TestHub

My weight is $\mathrm{w}=\mathrm{mg}$, but when I weigh myself in an elevator with a normal weighing machine I am surprised to see that it appears to be a different amount ${\mathrm{w}}_{\mathrm{ap}}$. If the coordinate y is measured vertically upward as positive, which one of the following statements is true if acceleration of elevator is ${\mathrm{a}}_{\mathrm{v}}$.