Related Words

Inertia: The tendency of a body at rest to remain at rest or a body in motion to remain in motion unless disturbed by an external force.

Inertial Load: A load (flywheel, fan, etc.) which tends to cause the motor shaft to continue to rotate after the power has been removed (stored kinetic energy). If this continued rotation cannot be tolerat . . . View Full Definition

Inertia Force: A force due to inertia, or the resistance to acceleration or deceleration.

Wk2 (Moment Of Inertia): The moment of inertia is expressed as Wk2or WR2in terms of pound-feet squared. It is the product of the weight of the object in pounds and the square of the radius of gyration in feet. If th . . . View Full Definition

Inertial Flow: A solution of the relative hydrodynamic equations of motion in which only the horizontal component of the Coriolis and centrifugal forces are balanced. This anticyclonic flow results from a . . . View Full Definition

Ignition Timing: The process of setting the time that a spark will occur in the engine combustion chamber (during the power stroke) relative to piston position or crankshaft rotation. Setting the correct ign . . . View Full Definition

J Seconds (Dc Motors): J is the per unit moment of inertia. It is defined as the time in seconds to accelerate the motor armature to rated base speed using rated full load torque. J = WR2x Base Rpm(seconds) or 308 . . . View Full Definition

Equilibrium Theory: A model under which it is assumed that the waters covering the face of the Earth instantly respond to the tide-producing forces of the Moon and Sun to form a surface of equilibrium under the . . . View Full Definition

Resonant Frequency: The frequency at which a speaker cone vibrates with the least inertia. The point on the spectrum at which it has the greatest amplitude relative to all other applied frequencies.

Reynolds Number: A number that represents the relative importance of viscous forces and inertial forces in a fluid. As Re increases, inertial forces become more important. In sea water, Re increaseswith incr . . . View Full Definition