The jet force is a rocket-like force due to Newton's third law which states that for every action there is an equal and opposite reaction. The backward moving exhaust of a burning fuel pushes a rocket or jet forward. It means that throwing a brick off the back of a child's wagon also would push the wagon forward.
Famous quotes containing the words jet and/or force:
“But every jet of chaos which threatens to exterminate us is convertible by intellect into wholesome force. Fate is unpenetrated causes.”
—Ralph Waldo Emerson (1803–1882)
“Every man who possibly can should force himself to a holiday of a full month in a year, whether he feels like taking it or not.”
—William James (1842–1910)