A 910 N man stands on a scale in an elevator that is accelerating downward 1.5 m/s^2. What does the scale read in N? If the elevator moves down with max. acceleration, what will the scale read?(adsbygoogle = window.adsbygoogle || []).push({});

I started to do this:

F = ma

910 N = m(9.8 m/s^2)

m = 92.86 kg

mg - F_s = ma

910 N - F_s = 92.86 kg*(-1.5 m/s^2)

F_s = 139.29 N + 910 N = 1049.29 N

But if the acc. is downward, wouldn't the scale have a reading that is < 910?

I also don't understand the second part. What is the maximum acc.?

Please correct me on my mistakes and help me on the second part. Thanks.

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# Homework Help: Scales in Elevators

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