A force which is at an angle θ to the horizontal (not being 90°) has two components Fx = FCosθ and Fy = Fsinθ along the x and y direction. However, when working out problems regarding objects on an incline, the horizontal (parallel to the slope) component of Normal force is taken as mgSinθ and the vertical (perpendicular to the slope) component is taken as mgCosθ. Can somebody explain ? I know this sounds silly, but I am confused.
The Attempt at a Solution
Is it something to do with the CCW convention?