A small block of mass m = 2.00 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 57.0 m above the bottom of the loop of radius R = 18.0 m. a) What is the kinetic energy of the mass at the point A on the loop? b)What is the downward acceleration of the mass at the point A of the loop? c)What is the minimum height h for which the block will reach point A on the loop without leaving the track?