Frequency of vibrations is usually expressed in

The particles of a body move ________ its axis in torsional vibrations.

In a spring-mass system, if the mass is halved and the spring stiffness is doubled, the natural frequency is

In free vibrations, the velocity vector leads the displacement vector by

In free vibrations, the acceleration vector leads the displacement vector by

The frequency of damped vibrations is always______the natural frequency.

At resonance, the amplitude of vibrations is

With usual notation, for a single degree of freedom system, the equation,

$\stackrel{..}{x}+36{\pi }^{2}x=0$ represents a natural frequency of

When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

Longitudinal vibrations are said to occur when the particles of a body move