I have labeled all the forces using the →Ftypeby,on convention introduced back in 14.1 (so, for instance, →Fksb is the force of kinetic friction exerted by the surf...I have labeled all the forces using the →Ftypeby,on convention introduced back in 14.1 (so, for instance, →Fksb is the force of kinetic friction exerted by the surface on the block); however, later on, for algebraic manipulations, and especially where x and y components need to be taken, I will drop the “by, on” subscripts, and just let the “type” superscript identify the force in question.
Note that, if you reduce the tilt of the surface (that is, make θ smaller), the cosθ term in Equation (???) grows and the sinθ term gets smaller, so we must ma...Note that, if you reduce the tilt of the surface (that is, make θ smaller), the cosθ term in Equation (???) grows and the sinθ term gets smaller, so we must make sure that we do not use this equation when θ is too small or we would get the absurd result that ax < 0, that is, that the force of kinetic friction has overcome gravity and is accelerating the object upwards!
