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Unit 2/Lesson 1Friction/Elastic Force
na
12
Physics
11th Grade
01/23/2012

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Term
Friction
Definition
A force that resists any movement between two or more surfaces that are in contact with each other.
Term
What 2 qualities determines the amount of friction force?
Definition
the nature/texture of each surface and the weight of each object.
Term
Static Friction
Definition
When the friction between two surfaces in contact is great enough to keep them from moving when a force is applied.
Term
Sliding Friction
Definition
When the force applied to an object is larger than the maximum static force, the object will move.
Term
Elastic Force
Definition
A force exerted by a material when it is stretched or compressed.
Term
Force is created because the material is __________from its _________________.
Definition
deformed (changed) and resting state
Term
An __________________ ________________ always wants to return to its resting state.
Definition
elastic material
Term
The two types of Elastic Force are:
Definition
tension and compression
Term
Tension Force
Definition
A pulling force applied to an object to make the object stretch.
Term
Compression Force
Definition
A squeezing force applied to an object to make the object shrink.
Term
Three examples of compression force objects are:
Definition
Rubber ball, spiral spring, clock/tension spring.
Term
Two examples of tension force objects are:
Definition
Rubber band and long, semi-rigid material (wood or metal.)
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