1. The problem statement, all variables and given/known data 2. Relevant equations Centripetal Acceleration = v2/r Fnet = ΣF 3. The attempt at a solution The block exerts a force W equal to its weight on the box at the top most position. This upward W minus W downwards and an unknown F downwards equals a net Fc downwards. So F equals Fc At the bottom position there is a W downwards and the total force on the box is this W plus something else The net force is Fc upwards since the speed is constant Now I get completely confused.