[SOLVED] Kinetic Energy A small block of mass m = 1.5 kg slides, without friction, along the loop-the-loop track shown. the block starts from the point P at rest a distance h = 55.0 m above the bottom of the loop of radius R = 19.0 m. What is the kinetic energy of the mass at the point A on the loop? So I use conservation of energy K1 + PE1 = K2 + PE2 or .5mv^2(1) + mgR(1) = .5mv^2(2) + mgR(2) At point A there's 0 KE. Is this right? Do I just plug numbers in?