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Circular Motion

QuestionAnswer
rotating occurs when an object turns about an INTERNAL axis
axis straight line around which rotational motion takes place
revolving occurs when an object turns about an EXTERNAL axis
Frequency definition the number of revolutions or rotations that occur in a unit of time
Frequency symbol f
Frequency equation 1/T or events/unit of time
Frequency unit Hertz (Hz) or 1/seconds
Period definition the time it takes to complete one revolution or rotation
Period symbol T
Period equation 1/f or unit of time/events
Period unit seconds
rotational speed definition the object's movement about central point
rotational speed all horses on a carousal have the same _________.
rotation speed equation w =(2*pi)/f or w = v/r
tangential speed definition how fast an object is traveling in a straight line at a moment in time
tangential speed equation v = (2*pi*r)/ T or v =w(r)
another term for rotational speed angular speed
another term for tangential speed linear speed
Centripetal means center seeking
Centripetal force and Centripetal acceleration both point towards the __________ of a circle the center
tangential velocity is _____________ to centripetal force perpendicular
When an object is moving in a circle it is consider to be __________________ even if it has a constant speed. accelerating
If a key chain was being swung in a circle and was accidently let go it would go off in a _______________ line. straight
centripetal acceleration equation a = v2/r
centripetal force equation F=mv2/r
Created by: NISD Physics
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