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θ is
the angle between the positive x-direction and the
line from P to G, what's also known as the lean. G is the center of mass of the rider and the board. P is the approximate contact point between the board and the snow. L is the distance between P and G. ac is the centripetal acceleration as it points to the center of a makeshift circle. RT is the radius of the turn. F1 is the force in the positive x-direction. N1 is the force in the positive y-direction.  (y-direction)
(x-direction)
(substitute for ac in problem 2)
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PE=mghKE=1/2mv^2
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(Newton's 2nd Law) |