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. p7.55).
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 snow ball, what angle a does a radial line from the center of the snow ball to the skier make with the vertical ?