A 80 kilogram person stands on a scale in an elevator. Whatwould the scale read

Question

A 80 kilogram person stands on a scale in an elevator. Whatwould the scale read when this: a) elevator is stationary b)elevator is descending at a constant velocity of2.0m/s c)elevator is ascending at a constant rate of 3.5m/s d)the elevator goes from rest to 2m/s in 1 second when thedown button is pushed. acceleration down of 2m/s squared. e)the up button is pushed and the elevator momentariltyaccelerates upward from the basement at 4.0m/s squared A 80 kilogram person stands on a scale in an elevator. Whatwould the scale read when this: a) elevator is stationary b)elevator is descending at a constant velocity of2.0m/s c)elevator is ascending at a constant rate of 3.5m/s d)the elevator goes from rest to 2m/s in 1 second when thedown button is pushed. acceleration down of 2m/s squared. e)the up button is pushed and the elevator momentariltyaccelerates upward from the basement at 4.0m/s squared

Explanation / Answer

a) 80(9.8m/s/s)=784N b)80(9.8m/s/s)=784N c)80(9.8m/s/s)=784N d)80(7.8m/s/s)=624N e)80(13.8m/s/s)=1104N When you are going a constant speed the weight is not affected,however if you are accelerating add the acceleration value to 9.8(that of gravity) then multiply by your mass.

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