A MAN OF MASS 80 KG ENTERS AN ELEVATOR ABOUT TO DESCEND. WHAT PRESSURE DOES HE EXERT ON THE FLOOR:
a.) what it is at rest?
b.)when it descends with an acceleration of 1m/s
c.) when it is brought to a stop with a deceleration of 1m/s
Let us call the required pressure Normal Force
Conclusion: Exercise may reduce the weight by 10 kg in less than a month. :)