friction from the atmosphere the velocity of the shuttle the mass of the shuttle gravity from Earth
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When a space shuttle orbits Earth and returns home, a force opposes its motion. What is the source of the opposing force?
Possibilities:
- friction from the atmosphere
- the velocity of the shuttle
- the mass of the shuttle
- gravity from Earth

friction from the atmosphere