1. The problem statement, all variables and given/known data A uniform horizontal rod of mass 4 kg and length 500 mm, is hinged at the left hand side and supported at rest by a chain (S) attached 10 cm from the hinge. Calculate the magnitude and direction of the reaction force on the rod at the hinge. State the principle you have used in solving this problem. 2. Relevant equations 3. The attempt at a solution Initially I thought it was the principle of moments but it can't be as it's all one sided. Unless there's a moment from the top of the chain to R. It's probably resolving the system into two vector components and then finding the resultant from that but I'm not sure how. I think that would be the right method?