Hello everyone, I'm really stuck on this question. The diagram shows an amusement park ride which contains a carriage attached to a mechanical arm. This arm spins around full circle. The carriage has a mass of 300 kg and a maximum occupancy of 300 kg. The question asks: With its carriage full, the second ride goes through the top of its swing. What is the value of the normal force if speed is 20 m/s? The solution sets it up as Fc= Fg + Fn= mv(squared)/r. I understand the equation, but why is the tension in the mechanical arm not included? I would think that it would also be a force contributing to the Fc. Thanks!