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Rotation
An object rotates about an internal axis.
Revolution
An object revolves around an external axis.
Linear Speed
The speed calculated as distance divided by time.
Tangential Speed
The speed of an object moving along a circular path, always tangent to the circle.
Rotational Speed
The number of rotations per unit of time, often measured in RPM or angular degrees per second.
Centripetal Force
Force directed inward towards the center of rotation to keep an object in a curved path.
Centrifugal Force
Force causing an object in a circular path to move out and away from the center.
v
Tangential Speed
r
radius from center
ω
rotational speed
a
∑F/m
v
2πr/T