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Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that ...

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Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that ...

Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that the asteroid has a small moon, which has been named Dactyl. From the dimensions of Ida and its general features, one can estimate the mass of Ida to be 4.5 × 1016 kg, and the distance between Dactyl and Ida is approximately 90 km. Assuming a circular orbit, what would be the orbital speed of Dactyl? (G = 6.67 × 10-11 N ∙ m2/kg2)
A) 5.8 m/s
B) 11 m/s
C) 2.3 m/s
D) 2.9 m/s
E) 30 m/s

Textbook

College Physics

Edition: 1^st

Authors: Etkina, Gentile, Van Heuvelen

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