A skier weighing 600 N goes over a frictionless circular hill of radius R - 20 m (Figure). Assume that the effects of air resistance on the skier are negligible. As she comes up the hill, her speed is 8.0 m/s at point B, at angle θ = 20^o.?

(a) What is her speed at the hilltop (point A) it she coasts without using her poles?

(b) What minimum speed can she have at B and still coast to the hilltop?

(c) Do the answers to these two questions increase, decrease, or remain the same if the skier weighs 700 N?

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A M R