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Physical Science Name The Laws of Motion Date _____/_____/_____ Period _____ Use the given words to fill in the blanks. Accelerated Motion Newton’s Second Law kilogram same Newton increases larger net force The acceleration of an object increases as the amount of applied to the object . A small mass will have a greater acceleration than a mass if the force is applied to each. One is the force needed to cause a one mass to be accelerated one meter per second each second. Falling Objects terminal velocity acceleration gravitational atmosphere air resistance moving object net force air resistance increases second terminal velocity 9.8 m/sec2 upward shape reduces kilograms equal All objects near the surface of Earth fall with the same . If an object started falling from rest, it would be traveling 9.8 m/sec at the end of one accelerates only if it has a . An object on it. The force on a falling object is the attraction of Earth. To find the weight of an object in Newtons, multiply its mass in by the acceleration due to gravity, . An object falling in Earth’s atmosphere has another force on it called . Air resistance is the force exerted by air on a . Air resistance acts in the the speed, size, and direction, and depends on of the falling object. As an object falls in air, the air resistance as the speed increases. When the upward force of air against the object is to the downward force of gravity, the object no longer accelerates. The largest velocity reached by a falling object is . The acceleration of an object on the moon is the same throughout its fall because there is no . Feathers fall more slowly than heavy, solid objects because of Earth’s . An open tissue very quickly reaches when it falls. The resistance of air on a parachute the terminal velocity of a falling person. Projectiles vertical velocity horizontal velocity direction independent constant horizontal vertical force of gravity is parallel to the surface of Earth. is toward Earth. When objects such as stones, balls, and arrows are thrown or shot, they have two kinds of motion, and When an arrow is shot, the horizontal velocity is more is exerted in that . because once in flight no . The vertical velocity of the arrow is accelerating downward because the . The vertical and horizontal velocities are completely of each other. Motion in Circles circular motion centripetal force force changing center straight line net force higher Any object will continue in a straight-line path unless a acts on it. The acceleration of an object moving in a circular path is toward the of the circle. In the case of a car rounding a curve, the frictional force of the road on the tires exerts the . Highways are often built with the outside edge of curves than the inside edge. This increases the available toward the center. A satellite in orbit about Earth is an example of . Without gravity, a satellite would continue along in a , not in a circular path. As a satellite circles Earth, the direction of its motion keeps .