1. The problem statement, all variables and given/known data "A uniform plank 3.0m long and a weight of 200N is supported horizontally and symmetrically across two trestles, A and B, placed 2.0m apart. Calculate the reaction force of each trestle. What is the maximum weight that can be placed at one end without the plank tipping over?" 2. Relevant equations Unsure 3. The attempt at a solution I have drawn a diagram of the situation, with the weight of 200N acting vertically downwards at 1.5m, with each trestle being 0.5m from each end of the plank, as it is symmetrical. From that I am unsure how to calculate the reaction forces. On regards to the second part where you have to calculate the maximum weight which can be placed at one end without the plank tipping, I feel as if I should be able to calculate that, one I have guidance on working out the reaction forces Thanks in advance!