Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Inertia is the tendency of an object to resist a change in its motion. The inertia of an object depends on its mass. Objects with greater mass have greater inertia. To overcome inertia, an unbalanced force must be applied to an object. Answer: inertia
A:
The tendency of an object to resist a change in its motion is called?