While skydiving, a brilliant young physics student known affectionately as “Crazy Kaitlin” launches herself horizontally out of an airplane. The plane is flying steadily at 12,500 feet above the Earth with a horizontal speed of 80 miles per hour. The total mass of Kaitlin and her gear is 75-kg. Assume g = -9.8 m/s2 While free-falling, Kaitlin engages in some aerial acrobatics. At one point, she finds herself rapidly spinning about an axis that runs from her head to her feet. If she wants to quickly decrease her rate of spin, the optimum way for her to this is: A) Cup her hands and claw wildly at the air B) Use counter-flagellation forces C) Fold her arms tightly across her chest to decrease her moment of Inertia. D) Stretch her arms and legs as far outward as possible to increase her moment of Inertia

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A: SOlution: Given that m = 2.5 kg M = 7.1 kg h = 3.8 m

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A:

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A:

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