Question

an object weighing 40 N rests on an inclined plane making an angle of 30 degree with the horizontal. Resolve the force into components parallel to the plane and perpendicular to the plane

Answer 1

$$W_{\text{\textbardbl}}=Wsin\theta=40\ N\cdot sin30^{\circ}=20\ N,$$ $$W_{\bot}=Wcos\theta=40\ N\cdot cos30^{\circ}=34.64\ N.$$