1. The problem statement, all variables and given/known data A capsule suspended on flat rails enters a curve in a pipeline. It has guide wheels on vertical axles to keep the main wheels on-track. As it enters the bend the front guide wheel impacts the side of a rail to steer the bogie. What is the force of this impact? Essentially, what force is required to change the direction of a moving body by x degrees (Newton basics)? 2. Relevant equations Tangential acceleration = dv/dt Centripetal acceleration = m*v^2/r F = ma 3. The attempt at a solution Is the centripetal force the only relevant component? If so I can calculate this. If it is the sum of centripetal and tangential then I am stuck, for I do not know how to estimate the tangential load (I do not know what the change in velocity will be over time). I know the capsule forward velocity, mass, and the radius of curvature (for the curve it is to traverse). Thanks for any help. I know this is very basic physics, and confess I should know the answer!