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- 1. Multiple-choice30 seconds1 pt
Gravitational force between two objects is inversely proportional to the distance between them.
True
False
- 2. Multiple-choice30 seconds1 pt
The gravitational forces between two spheses form an action-reaction pair.
True
False
- 3. Multiple-choice30 seconds1 pt
The gravitational field strength g has a unit of N kg-2.
True
False
- 4. Multiple-choice30 seconds1 pt
The weight of an object increases as the distance between the object and the surface of the Earth increases.
True
False
- 5. Multiple-choice30 seconds1 pt
The gravitational field strength g is a variable and can have different values at different places.
True
False
- 6. Multiple-choice30 seconds1 pt
For satellites that move in a circular path, their acceleration is equal to .
True
False
- 7. Multiple-choice30 seconds1 pt
All geosynchronous satellites rounding the Earth share the same orbit.
True
False
- 8. Multiple-choice30 seconds1 pt
Astronaut inside a spacecraft rounding the Earth has a zero weight.
True
False
