Resources

The following resources will help you answer these questions

1. Page 73 of the specification is your best resource to help you answer these questions. – https://filestore.aqa.org.uk/resources/physics/specifications/AQA-8463-SP-2016.PDF
2. The bbc bitesize website has good coverage of space. https://www.bbc.co.uk/bitesize/topics/zsbyh39

Questions

1. What is the difference between a natural and an artificial satellite? 
2. How are they able to remain in a circular orbit? 
3. What are the similarities and differences between planets, their moons and artificial satellites? 
4. How can an object that is moving in a circular orbit be at a constant speed but changing velocity? Hint → Which one is a vector? 
5. Why must the radius of an orbiting object change if its speed changes? Use the term ‘force of gravity in your answer.