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An astronaut’s mass on Earth is 85 kg. What is his mass on Jupiter, where gravity is 2.53 times Earth’s?

  1. A
    33.6 kg
  2. B
    85 kg
  3. C
    87.53 kg
  4. D
    215.05 kg

Topic Flashcards

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Question

Define mass and weight and state which one changes with location (like on different planets).

Answer

Mass is the amount of matter in an object (kg). Weight is the gravitational force on that mass (N). Weight changes with location; mass does not.

Question

What is the formula that relates weight (W), mass (m), and gravitational acceleration (g)?

Answer

W = m × g.

Question

Calculate the astronaut's weight on Jupiter if his mass is 85 kg and Jupiter's gravity is 2.53 times Earth's (g_Earth ≈ 9.8 m/s²).

Answer

g_Jupiter = 2.53 × 9.8 m/s² ≈ 24.8 m/s². Weight (W) = 85 kg × 24.8 m/s² ≈ 2108 N

Question

What would the astronaut's weight be in newtons if he were in deep space, far from any significant gravitational field?

Answer

Approximately 0 N (weightless). His mass, however, would still be 85 kg.

Question

Why is the answer to the original question (85 kg) correct even though Jupiter's gravity is stronger?

Answer

Because mass is an intrinsic property of an object that measures its quantity of matter. It does not depend on the local strength of gravity.

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Does an object's mass become zero in the zero-gravity environment of deep space?
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