A Roller Coaster Starting from Rest Descends 35 Meters in Its

Short Answer

A roller coaster starting from rest descends 35 meters in its initial drop and then rises 23
meters when it goes over the first hill, which has a circular shape over the top. If a
passenger at the top of the hill feels an apparent weight equal to one-half of her normal
weight, what is the radius of curvature of the first hill? Neglect any frictional losses.