It was one of those complicated fabrics that have since been called handling-machines, and the study of which has already given such an enormous impetus to terrestrial invention.
The Martian staggered with the violence of her explosion, and in another moment the flaming wreckage, still driving forward with the impetus of its pace, had struck him and crumpled him up like a thing of cardboard.
There are no more uses of "impetus" in the book.
Show samples from other sources
Budget cuts were the impetus for the reorganization.
The Supreme Court decision provided the impetus for the change.