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| An object's change in position relative to a reference point |
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| The distance traveled divided by the time interval during which the motion occurred. |
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| The speed of an object in a particular direction |
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| The rate at which velocity Changes over time; an object accelerates if its speed, direction, or both change |
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| A push or a pull exerted on an object in order to change the motion of the object; force has size and direction |
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| Combination of all forces acting on an object |
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| A force that occurs between two surfaces. |
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| A force of attraction that occurs between two objects due to their masses. |
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| Measure of the gravitational force on an object |
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| How much space an object takes up |
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| This kind of friction includes brakes in a car, moving a book across a desk |
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| Type of friction including wheels, skateboard on pavement. |
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| Friction in the air, like a plane driving and water vapor and air going on it. |
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| this friction is stationery when force is applied but nothing moves. |
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Displacement
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Time |
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final velocity-starting velocity
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time |
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| Rougher surfaces = MORE OR LESS FRICTION |
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| Rougher surfaces equal more friction. |
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| Two ways friction is good |
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| Brakes in cars and it can be used to create heat. |
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| THe closer two objects are= greater or lesser force |
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| Greater force is made when objects are closer together. |
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| Acceleration is expressed in |
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| Friction is changed by rougher or smoother textures. |
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| Why do we not notice all objects moving toward each other |
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| because the earth's mass is super huge in comparison to us. |
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| Whatever we compare to the earth's surface that is moving |
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| To correctly observe motion we need to... |
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| observe motion in reference to another object |
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| Velocity always includes a |
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| When speed and direction are constant the velocity is... |
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