Transcript Uniform Circular Motion notes

UNIFORM CIRCULAR MOTION
Centripetal force
UNIFORM CIRCULAR MOTION
Motion at a constant
speed around a
circle with a constant
radius.
V
Ac
Fc
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 = 2πr/T
ACCELERATION
Change in the direction of the velocity per
time.
Directed radially inward
This type of center-seeking acceleration said
to be CENTRIPETAL
ac
2
= V /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.
Fc = mac