We are told that an elevator falls freely, which means that the only force acting upon it is its weight. The weight is defined as:
[tex]W=mg[/tex]
Where "m" is the mass and "g" is the acceleration of gravity. Replacing the given values:
[tex]\begin{gathered} W=(100\operatorname{kg})(10\frac{m}{s^2}) \\ W=1000N \end{gathered}[/tex]
Therefore, the force that acts upon the elevator is 1000N.
