Mastery Quiz (See related pages) 1 The belief that a force is necessary for motion to continue at constant velocity was advanced by A) Newton B) Galileo C) Aristotle 2 According to Newton's First Law A) a force is necessary to maintain motion at constant velocity B) if an object is at rest it will always stay at rest C) a force is necessary to cause an object to leave its state of rest D) once an object is in motion a force cannot change its velocity 3 The physical quantity that is the measure of inertia is the . 4 The basic unit of force is A) kilogram B) meter C) pound D) newton E) ton 5 The equation expressing Newton's Second Law is . 6 The basic unit of mass is the . 7 Weight is A) the same as mass B) the difference between gravitational attraction and air resistance C) the force of gravity acting on an object D) dependent upon the velocity of an object 8 A succinct statement of Newton's Third Law in three words is . 9 Compared to its reading when at rest a bathroom scale with a person standing on it in an elevator that is accelerating upward would indicate A) a greater reading B) the same reading C) a smaller reading D) no reading at all 10 Compared to its reading when at rest a bathroom scale with a person standing on it in an elevator on which the cable has just broken and the elevator is in free fall would indicate A) a greater reading B) the same reading C) a smaller reading D) no reading at all
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