Definitions
The motion of an object in a circle at a constant speed
Uniform Circular Motion
Circumference
The perimeter of a circle
The distance from the center of an orange to the circumference
The Radius
circumference = 25.13 cm
diameter = 8 cm
radius = ?
Radius = 4 cm
The acceleration of an object moving in a circular path
The number of complete rotations per time unit
Rotational Speed
Frequency
The number of waves that pass a fixed point
The motion of the hands on a clock
Uniform Circular Motion
radius = 9 cm
diameter = 18 cm
circumference = ?
circumference = 56.55 cm
Centripetal Force
A force that acts on an object moving in a circular path and is directed toward the center
When an object turn on its own axis
Rotation
Axis of Rotation
The center around which something rotates
Frequency
time = 82 sceconds
revolution = 4
period = ?
period = 20.5
The ball pulling away in a hammer throw
Centrifugal
How quickly an object is traveling within a circle
Tangential Speed
Revolution
When an object circles around another object
The rotation of Earth on its own axis
Axis of Rotation
velocity = 15 m/s
radius = 7 m
centripetal acceleration = ?
centripetal acceleration = 32.14 m/s 2
mass = 22 kg
centripetal acceleration = ?
centripetal force = 616
centripetal acceleration = 28 m/s 2
Moving or tending to move toward a center (inward)
Centripetal
Centrifugal
Moving or tending to move away from a center (outward)
The blades on a helicopter
Rotation
mass = 17 kg
centripetal acceleration = 54 m/s 2
centripetal force = ?
centripetal force = 918 N
velocity = ?
radius = 7 m
centripetal acceleration = 24.14 m/s 2
*round to the nearest whole number*
velocity = 13 m/s