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| The state in which one object distance from another is changing. |
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| The place or object used for comparison to determine if something is in motion. |
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| The distance an object travels divided by the time it took to travel that distance. |
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| The speed and direction of an object |
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| The rate at which velocity changes. It can be increasing speed, decreasing speed or changing direction. |
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| Final Speed - Original Speed divided by Time |
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| The mass multiplied by the acceleration. |
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| Forces that produce a nonzero net force, which changes the object's motion. |
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| Equal forces acting on an object in opposite directions. |
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| The force that one surface exerts on another when the two surfaces rub against each others. |
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| Friction acting on a stationary object (an object not in motion) |
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| Friction that occurs when two surfaces slide past one another. |
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| Friction that occurs when an object rolls over a surface |
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| Friction that occurs as an object moves through a fluid (air or liquid) |
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| The force that pulls objects towards each other. |
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| The amount of matter in an object. |
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| The force of gravity acting on an object on the surface of a planet. |
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Definition
| The motion of a falling object when the only force acting on the object is gravity. |
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Definition
| The fluid friction experienced by objects falling through the air. |
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Definition
| The greatest velocity a falling object can achieve. Occurs when the force (gravity) pushing down equals the force (air resistance) pushing up. |
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| An object that is thrown. |
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