A mass m moves in a horizontal circle of radiuss r inside a frictionless cone of angle 2t. Determine the speed of the mass. I drew the free body diagram for the mass. Normal force points toward the center in the same direction as the acceleration. Gravity points down. x) N = m*v^2/r I don't know why, but gravity is the only force acting in the vertical direction. There is nothing to balance it out. I know that I will need to use the angle 2t somehow, but I don't know what to do.