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Force increases:Mass increases

2: Gravitational force decreases as distance increases. Weight changes, mass doesn't

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Amoiunt of matter in an object

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Use a lubricant like oil, or grease

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Harmful ex.  Wear and tear on a car
Helpful ex. Tires sticking to a road to move around.

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Kenetic friction is the frction when the object is moving

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Kenetic friction is the frction when the object is moving

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Static friction is the friction when the object is not moving

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The rougher the surface is the more friction to rub on.

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More force=More friction

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A resistance of objects when rubbed together

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Balanced means the net force is 0, Unbalanced means the net force is not equal to 0.

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If forces go in the same direction, they add together. If they go opposite, they cancel.

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an example is gravity.

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friction, applied, normal, and gravity.

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all the forces combined
(4 Ns+4Nn=0N

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A push or pull to an object

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The rate of changing motion speed
(Second time-First time divided by second distance- first distance)

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5mph N + 4Mph S = 1Mph N

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How fast object is moving with a direction (N,S,E,W)

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how fast the object is moving
Distance Divided by Time for average speed

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Objects used to find speed or velocity

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The rougher the object, the more the friction

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The more the force, the more the friction

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The more weight, the more the friction

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Static is when the object is not moving

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1:Kinetic
2:Static