The coefficient of kinetic friction between the surface and the largest block is 0.20, and the coefficient of kinetic friction between the surface and the smaller block is 0.40. If F=25 N and M=4.0kg in the figure, what is the tension (in N) on the connecting string
![The coefficient of kinetic friction between the surface and the largest block is 020 and the coefficient of kinetic friction between the surface and the smaller class=](https://us-static.z-dn.net/files/dd8/ab1d2843301fc8f03154f31563d3b68f.png)