sustainable thesaurus. Retrieved October 19, 2015, from http://www.powerthesaurus.org/sustainable/synonyms.
the mass of the object determines the amount of inertia in an object. Mass determines the amount of inertia an object has. It is an object's intrinsic property to resist change. the two main things are speed and velocity. You have to factor in a bunch of smaller things too, but those don't really have much effect.
Inertia is the tendency of an object to resist any change in its motion. Two objects with the same mass and same velocity will both have the same amount of inertia. However, if they have different velocities, they will have different amounts of inertia. Consider two trains, one moving at 100 kilometers per hour, and the other moving at 120 kilometers per hour.