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A skier starts at the
top of a very large, frictionless
snowball, with a very small
initial speed, and skis straight
down the side (Fig. ). 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?
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