Physics

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A small block of mass m=1.9kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h=52.0m above the bottom of the loop of radius R=19.0m. What is the kinetic ennergy of the mass at the point A on the loop? What is the downward accelerations of the mass at point A? What is the minimum height h for which the block will reach point A on the loop without leaving the track?

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