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A skier starts at the top of a very large, frictionless snowball, with a very
small initial speed, and skies straight down the side. At what point does she lose contact
with the snowball and fly off at a tangent. That is, at the instant she loses contact with the
snowball, what angle a does a radial line from the center of the snowball to the skier make
with the vertical?
skier

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