If ω/ω_n is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as

The cam follower generally used in air-craft engines is

The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

Frequency of vibrations is usually expressed in