An ice cube, p = 917 kg/m^3, is sliding down a 16 degree frictionless incline. The sides of the cube each have a length of .75 m. What pressure does the cube exert on the incline? P = F / A = F / .75^3 = F / .42 F = ma = 917 * a I am having a problem figuring out the Force for this equation. I know it's simple, just can't put my finger on it. Please help.