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Questions and Answers
What is the universal law of gravitation?
What is the universal law of gravitation?
- It states that the force of gravity between two objects is inversely proportional to the product of their masses.
- It states that the force of gravity between two objects is constant regardless of their masses.
- It states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. (correct)
- It states that the force of gravity between two objects is directly proportional to the distance between their centers.
What is the SI unit of gravitational constant G?
What is the SI unit of gravitational constant G?
- N m^2/kg^2 (correct)
- N/kg
- Joule
- m/s^2
What is the escape velocity from the Earth's surface?
What is the escape velocity from the Earth's surface?
- 3.0 x 10^8 m/s
- 6.67 x 10^-11 N m^2/kg^2
- 11.2 km/s (correct)
- 9.8 m/s^2
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