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Section 9 Circular Motion Vocabulary
Vocabulary Section 9 Circular Motion
8
Physics
11th Grade
08/14/2011

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Term
axis
Definition
The straight line around which an object may rotate or revolve
Term
centrifugal force
Definition
An apparent outward force on a rotating or revolving body. It is fictitious in the sense that it is not part of an interaction but is due to the tendency of a moving body to move in a straight-line path
Term
centripetal force
Definition
A center-directed force that causes an object to move in a curved (sometimes circular) path
Term
linear speed
Definition
The path distance moved per unit of time. Also called simply speed
Term
revolution
Definition
Motion of an object turning around an axis outside the object
Term
rotation
Definition
The spinning motion that takes place when an object rotates about an axis located within the object (usually an axis through its center of mass)
Term
rotational speed
Definition
the number of rotations or revolutions per unit of time; often measured in rotations or revolutions per second or per minute (RPM)
Term
tangential speed
Definition
The speed of an object moving along a circular path
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