Spaceman Speff Orbits Spherical Asteroid X with His Spaceship

question 20

Multiple Choice

Spaceman Speff orbits spherical asteroid X with his spaceship.To remain in a circular orbit at 421 km from the asteroid's center,he should maintain a speed of What is the mass of planet X? (G = 6.67 × 10^-11 N ∙ m²/kg²)

• A)4.0 × 10¹⁹ kg
• B)5.1 × 10¹⁷ kg
• C)4.0 × 10¹⁶ kg
• D)5.1 × 10¹⁴ kg

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