UNIFORM CIRCULAR MOTION Centripetal force. UNIFORM CIRCULAR MOTION  Motion at a constant speed around a circle with a constant radius. V Fc Ac.

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Presentation transcript:

UNIFORM CIRCULAR MOTION Centripetal force

UNIFORM CIRCULAR MOTION  Motion at a constant speed around a circle with a constant radius. V Fc Ac

PERIOD  Time to complete one revolution.  Symbol: T  Unit: seconds (s)

FREQUENCY  The number of revolution per unit time  Sometimes known as the rpm (revolutions per minute)  Symbol: f  Unit: Hertz (Hz)

VELOCITY  Constant speed but changing direction.  Objects velocity is directed tangential to the radius in the direction of rotation. V = 2 πr/T

ACCELERATION  Change in the direction of the velocity per time.  Directed radially inward  This type of center-seeking acceleration said to be CENTRIPETAL a c = V 2 /r

FORCE  What causes an object to travel in a circle.  Directed radially inward.  In the same direction as the acceleration.  Commonly known as CENTRIPETAL FORCE. F c = ma c