1. The problem statement, all variables and given/known data Solve for the forces P and N acting on an object in equilibrium on an inclined plane. Weight=10N, angle is 30 degrees http://blob:https%3A//www.physicsforums.com/d431a152-5681-411b-ba57-809320539165 2. Relevant equations Trigonometry, i.e. sin, cos, tan rules. The 'Z' rule (amongst others) to determine angles. 3. The attempt at a solution I have attempted the problem (as done with similar problems, which were correct) however the answers seem to assume that the angle in solving P is 30. I have used in the Parallel P=10tan60=17.32N. However the answer is given by 10tan30=5.77N. Is the answer wrong? Or have I made inaccurate assumptions? In the perpendicular, N=10sin60=8.66N, however this is wrong also! The answer is given by 10/sin60 Thankyou for any help.