Bathroom scales read the normal force that is exerted against the floor. What would a scale read when a 100 kg man is in an elevator accelerating upward at 1.2 m/s2? What would it read when the man is accelerated downward at 1.8 m/s2?

a

When the lift is moving upward  

b

When the lift is moving downward  

Explanation:

From the question we are told that

     The mass of the man is

     The upward acceleration is  

     The downward acceleration is  

Generally the force which the scale will read  when the man is moving downward is according to Newton second law represented as  

Here

=>    

=>    

Generally the force which the scale will read  when the man is moving upward  is according to Newton second law represented as  

Here

=>    

=>    

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