<p>An inclined plane is bent in such a way that the vertical cross-section is given by&nbsp;<span class="equation">\(y = \frac{x^2}{2}\)</span> &nbsp;where y is in vertical and x in horizontal direction. If the upper surface of this curved plane is rough with coefficient of friction&nbsp;&nbsp;<span class="equation">\(\mu\)</span>​​​​​​​= 0.5, the maximum height in cm at which a stationary block will not slip downward is _________ cm.</p>