We are going to get 2 equations with two unknowns, one from the hanging mass and one from the square mass. We will then solve for one of the unknows and plug it into the other equation. We start with the hanging mass.
Round mass:
Square mass:
The normal force exerted by the ramp on the block is equal to the y-component of the weight (6-7). The normal force is used to find the force of kinetic friction (8).
Add equations (3) and (13) together to eliminate T and solve for a
