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Question 3.5: ACCELERATION OF A SKIER, CONTINUED Let’s consider again the ...

ACCELERATION OF A SKIER, CONTINUED

Let’s consider again the skier in Conceptual Example 3.4. What is her acceleration at each of the points G, H, and I in Fig. 3.21a after she flies off the ramp? Neglect air resistance

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Figure 3.21b shows our answer. The skier’s acceleration changed from point to point while she was on the ramp. But as soon as she leaves the ramp, she becomes a projectile. So at points G, H, and I, and indeed at all points after she leaves the ramp, the skier’s acceleration points vertically downward and has magnitude g. No matter how complicated the acceleration of a particle before it becomes a projectile, its acceleration as a projectile is given by a_x = 0, a_y = -g.

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