A cube has side length 5 cm and modulus of rigidity 10^5 N / m^2. The displacement produced by a force of 10 N in the upper face of cube is ____ mm.

A cube has side length $\displaystyle 5$ cm and modulus of rigidity $\displaystyle 10^5 \mathrm{~N} / \mathrm{m}^2$. The displacement produced by a force of $\displaystyle 10$ N in the upper face of cube is $\displaystyle \_\_\_\_$ mm .