Resultante normal num conjunto com três blocos formando um sistema de plano inclinado

The figure below illustrates three blocks of masses mA = 2 kg, mB = 4 kg, and mC = 10 kg initially at rest in a region where g = 10 m/s². Block C (whose cross-section forms an equilateral triangle) is fixed, and the system is released. What is the magnitude of the normal force that the horizontal surface exerts on mC? Link to the PDF solutions on Google Drive: https://drive.google.com/drive/folder... #ita #ime #efomm