Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: Ionic compounds contain cations and anions rather than discrete neutral molecules.
[A]: Ionic compounds contain cations and anions rather than what?


[Q]: If the amount of force of that is applied is increased, it is easier happens to the work that a machine is producing.
[A]: If the amount of force of that is applied is increased, what happens to the work that a machine is producing?


[Q]: In physics, work means the use of force to move an object.
[A]:
In physics, work means the use of what to move an object?