The conversation between human and AI assistant.
[|Human|] Write down one example of a force that does work on an object?
[|AI|] One example of a force that does work on an object is gravity. When an object falls from a higher position to a lower one, gravity pulls it downwards and does work on the object, which causes it to gain kinetic energy as it falls.
[|Human|] 
Write down one example of a force that does work on an object?