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### 16 Cards in this Set

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 when objects fall toward Earth with no forces acting upward; air resistance is neglected when it comes to this free fall the product of the fource and the time of application impulse tendency of an object to remain in unchaging motion whether actually moving or at rest, when the net force is zero inertia the total momentum of a group of interacting objects remains constant in the absence of external forces law of conservation of momentum the product of the mass of an object times ins velocity momentum a unit of force defined as kg.m/s2; this is needed to accelerate a 1 kg mass 1 m/s2 newton Quantityof 5 m/s2 is a measure of acceleration Automobile has how many different devices that can cause it to undergo acceleration three or more Ignoring air resistance, an object faling toward the surface of Earth has a velocity that is increasing Ignoring air resistance, an object falling near the surface of Earth has an acceleration that is constant Two objects are released from the same height at the same time and one has twice the weight of the other. Ignoring air resistance they both hit at the same time A ball rolling across the floor slows to a stop because there is a net force acting on it Considering the forces on the system of you and a bicycle as you pedal the bike at a constant velocity in a horizontal straight line all forces are in balance, with the net force equal to zero If you double the unbalanced force on an object of a given mass, the acceleration will be doubled If you double the mass of a cart while it is undergoing a constant unbalanced force, the acceleration will be half as much Doubling the distance between the center of an orbiting satellte and the center of Earth will result in what change in the gravitational attraction of Earth for the satellite one fourth as much