Noun: Impetus (IM-puh-tus)
1. A driving force: impulse.
2. Incentive, stimulus.
3. Stimulation or encouragement resulting in increased activity.
4. The property possessed by a moving body in virtue of its mass and its motion, used of bodies moving suddenly or violently to indicate the origin and intensity of the motion.
Sample sentence: The high salary and generous benefits package were impetus enough to apply for the job.