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Circular Motion
Question | Answer |
---|---|
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 |