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        | Term 
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        | The sum of two or more forces on an object. |  | 
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        | Result in a net force on an object that can cause changes in motion. |  | 
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        | The property of an object that resists changes in it's motion |  | 
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        | The distance an object travels divided by the time it takes.  s= d/t     |  | 
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        | A variable that tells both speed and direction |  | 
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        | Term 
 
        | What is the difference between Speed and Velocity? |  | Definition 
 
        | Speed and Velocity are different because speed is a measurement of distance and time but velocity is a measurement of speed and direction. |  | 
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        | Term 
 
        | Newton (as in a measurement) |  | Definition 
 
        | The metric unit of force, equal to the force needed to make a 1 kg a object accelerate at 1 m/s^2 |  | 
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        | An object at rest will stay at rest and an object in motion will stay in motion with the same velocity unless acted upon by an unbalanced force. |  | 
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        | Acceleration is force/mass.   A=F/M F=MA M=F/A |  | 
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        | For every action force, there is a reaction force equal in strength and opposite in direction. |  | 
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        | What is the relationship between mass and acceleration? |  | Definition 
 
        | When mass goes up, acceleration goes down. This is called being inversely proportional.   |  | 
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        | When a spacecraft (in outerspace) is out of range from the gravitational pull of Earth, a spacecraft can travel in a constant direction, at a constant speed because that pull of gravity is gone. |  | 
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