COMMON TERMS AND PRINCIPLES
= angular position of an object. It is the angle at which it is oriented. It is mea- sured from one arbitrary reference point (units: rad or deg).
w = angular velocity = d /dt. It is the rate of variation of angular position with time (units: rad/s or deg/s).
fm = angular velocity, expressed in revolutions per second = wm/2’IT.
a . = angular acceleration = dw/dt. It is the rate of variation of angular velocity with time (units: rad/s2).
T = torque = (force applied) X (perpendicular distance). Units are newton-meters (N·m)
Newton’s law of rotation:
T= Ja.
where J is the moment of inertia of the rotor (units: kg·m2).
W = work = T , if T is constant (units: J).
P = power = dW/dt. It is the rate of variation of work with time (units: W):
P = Tw