1. The problem statement, all variables and given/known data A small block of mass m = 1.8 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 56.0 m above the bottom of the loop of radius R = 17.0 m. What is the kinetic energy of the mass at the point A on the loop? What is the downward acceleration of the mass at the point A of the loop? What is the minimum height h for which the block will reach point A on the loop without leaving the track? 2. Relevant equations work = mass x gravity x (initial height - final height) KE = 1/2mv^2 3. The attempt at a solution For the downward acceleration should I find via forces? If so when the block is at A is both weight and normal force acting on it or just weight, I kind of don't really understand how to do it if that's wrong. For the second part with the minimum height I'm not really sure either do I do that via forces as well?