1. The problem statement, all variables and given/known data 2. Relevant equations Radial and Transverse coordinates to relate acceleration Balancing forces 3. The attempt at a solution I know that there is more to this problem, but my question is simple: Why don't we know what the normal force is? When I solved it myself I just set the Normal force to mass * gravity... why isn't this the case for this problem? All of the solutions I've found have them creating a relation between the X and Y force eqns. and setting them equal to solve. Why can't we just set N = mg as I was so used to doing?