halving the distance between them doubling the distance between them halving the distance between them and doubling their mass doubling the distance between them and halving their mass
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these will reduce the gravitational force between two objects the most?
Possibilities:
- halving the distance between them
- doubling the distance between them
- halving the distance between them and doubling their mass
- doubling the distance between them and halving their mass

doubling the distance between them and halving their mass