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Section 9 Circular Motion Vocabulary
Vocabulary Section 9 Circular Motion
8
Physics
08/14/2011

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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