An Astronaut Drops a Marble on the Surface of the Airless

question 55

Multiple Choice

An astronaut drops a marble on the surface of the airless Planet Z-49 and observes that it takes 1.02 s for the marble to fall 2.00 m starting from rest. She also knows that the radius of Z-49 is 3.39 × 10⁶ m. From this information, what will she determine for the mass of Z-49? (G = 6.67 × 10^-11 N ∙ m²/kg²)

• A) 3.30 × \(10^{23}\) kg.
• B) 6.62 × \(10^{23}\) kg.
• C) 4.62 × \(10^{23}\) kg.
• D) 8.09 × \(10^{23}\) kg.
• E) 9.95 × \(10^{23}\) kg.

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Definitions:

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