A property possessed by a moving body in virtue of its weight and its motion; the force with which any body is driven or impelled; momentum.

Fig.: Impulse; incentive; stimulus; vigor; force; as, the President's strong recommendation provided the impetus needed to pass the campaign reform bill.

a driving force

Impetus is a re-release of the EP Passive Restraints by rock band Clutch, with 2 new tracks added. It was released in 1997, and contains 5 tracks.

The altitude through which a heavy body must fall to acquire a velocity equal to that with which a ball is discharged from a piece.