1. Geostationary satellites orbit the Earth above the equator. How far from the surface of the Earth do they orbit?
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2. Similarly to satellites orbiting Earth, the orbital period of a planet is longer the further away it is from the Sun. Why is this?
- A weaker gravitational force of attraction is present between the planet and the Sun.
- A greater gravitational force of attraction is present between the planet and the Sun.
- Smaller planets tend to be furthest away from the Sun
- This statement is incorrect as the distance between two objects does not affect the gravitational force of attraction present between them
3. The force between two objects increases as the distance between them decreases. This is an inverse square law. If the distance between two objects is enlarged by a scale factor of ten, what happens to the force between them?
- It decreases to one millionth of what it was originally
- It decreases to one hundredth of what it was originally
- It decreases to one thousandth of what it was originally
- It decreases to one tenth of what it was originally
4. The particular height of the orbit of a geostationary satellite ensures that:
- the satellite can orbit the Earth much faster than the rate that it is turning
- the satellite remains stationary
- the satellite's orbital period is 24 hours long, so it appears stationary when observing from the Earth's surface
- the satellite is able to pass over the entire surface of the Earth, as the Earth continues to turn whilst the satellite orbits
5. The forward motion preventing Earth's gravitational pull from making a satellite fall to its surface is called:
- tangential motion
- centripetal force
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