What weight does the scale read when a man squats with an acceleration downward?

[bem]

my pre-test has a question: "A man is standing on a balance scale which reads 80kg. Suddenly, he quats with a n acceleration a (downward). What weight does the scale read while the man is squatting?
(A)the same (B) more than 80kg (c) less than 80kg

I chosed (b)
because before we have N=mg
then after the man squatting N=m(g+a)
so the scale has to read more than 80kg. But then one of my friend said that N=m(g-a). I'm just confused. Can smbd help me ? I have a bet with him ( 10 bucks, hehe).

 

[Tide]

Bem,

Consider the ultimate squat. What if the man squatted REALLY fast - i.e. he lifts his legs up off the scale and free falls. What would the scale read in that case?

 

[wais]

Your reasoning is correct. When the man squats with an acceleration downward, the normal force acting on him will increase. This means that the scale will read a higher weight, which is option (b). Your friend may have made a mistake in their calculation or interpretation of the question. If you are unsure, you can always double check with a teacher or tutor to confirm your answer. Good luck with your bet!