###
the motion of a body about an internal axis

Rotary Motion

###
the time rate of angular displacement

Angular Velocity

###
the constant rate of change of angular velocity

Angular acceleratoin

###
a mathematical expression of the distribution of the mass of a rotating object

Rotational inertia

###
the horizontal rotation of the shaft

Precession

###
the property of a body moving repeatedly over the same path in equal intervals of time

Periodic motion

###
linear motion in which the acceleration is proportional to the displacement from an equilibrium position and is directed toward that position

Simple harmonic motion

###
the distance from the midpoint of its vibration at that particular instant

displacement in harmonic motion

###
the maximum displacement

amplitude of harmonic motion

###
the number of vibrations per second

period of harmonic motion

###
the midpoint of its path

equilibrium position of harmonic motion

###
an object suspended so that it can swing back and forth about an axis

Pendulum

###
an angle that when placed with its vertex at the center of a circle, subtends on the circumference an ark equal in length to the radius of the circle

Radian

###
the angle about the axis of rotation through which the object turns

Angular Displacement

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