Physics Force & Laws Of Motion Level: Misc Level

A small block of mass m = 1.3 kg slides, without friction, along the loop - the- loop track shown. The block starts from the point P a distance h = 53.0 m above the bottom of the loop of radius R =A 20.0 M. what is the kinetic energy of the mass at the point A on the loop ? What is the down ward 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?