Force
In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. It is measured with the SI unit of newtons and represented by the symbol F. In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity.
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Famous quotes containing the word force:
“Harsh necessity, and the newness of my kingdom, force me to do such things and to guard my frontiers everywhere.”
—Virgil [Publius Vergilius Maro] (70–19 B.C.)
“The primacy of the word, basis of the human psyche, that has in our age been used for mind-bending persuasion and brain-washing pulp, disgraced by Goebbels and debased by advertising copy, remains a force for freedom that flies out between all bars.”
—Nadine Gordimer (b. 1923)
“Nations do not think, they only feel. They get their feelings at second hand through their temperaments, not their brains. A nation can be brought—by force of circumstances, not argument—to reconcile itself to any kind of government or religion that can be devised; in time it will fit itself to the required conditions; later it will prefer them and will fiercely fight for them.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)