(adsbygoogle = window.adsbygoogle || []).push({}); A 75 kg person is standing on a bathroom scale in an elevator. The scale is calibrated to read in Newtons. The elevator is accelerating upward at 135 m/s^{2}. What is the reading on the scale? What apparent value of g does the man give?

The Free Body Diagram

Normal on the man, upward

Weight mg of the man, downward

My Attempt/Logic

The only two forces acting on the man are normal force and weight.

F_{N}- mg = ma

f_{N}= mg + ma, where N is the reading on the scale.

F_{N}= (75)(9.8) + (75)(135)

F_{N}= 10860 N

The solution reads 8.5x10^{2}N? Am I doing something wrong? This problem seems very basic, but I am obviously missing something.

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# Newton's law, normal force, acceleration

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