Final answer:
The expressions for net force in the x- and y-directions along the incline are: Wx = mg sin(theta) and Wy = mg cos(theta).
Step-by-step explanation:
In order to write the expressions for net force in the x- and y-directions along the incline, we need to first break down the forces acting on Blaine. The force due to gravity can be broken down into two components: one parallel to the incline (Wx), and one perpendicular to the incline (Wy).
The expression for Wx is given by: Wx = mg sin(theta), where m is the mass of Blaine, g is the acceleration due to gravity, and theta is the angle of the incline.
The expression for Wy is given by: Wy = mg cos(theta).