Logarithmic decrement is defined as the ____________ of the amplitude reduction factor.

In damped vibrations, the amplitude of the resulting vibration gradually reduces. This is due to the reason that an amount of energy is always dissipated to overcome the ________.

An increase in the modulus of rigidity results in ________ in vibration frequency.

An increase in the length of the shaft results in ________ in vibration frequency.

An increase in the mass moment of inertia results in ________ in vibration frequency.

If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system?

An increase in the polar moment of inertia results in ________ in vibration frequency.

If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system?

Which of the following relation is correct regarding free torsional vibrations of a single motor system?

At a nodal point in a shaft, the amplitude of torsional vibration is ___________ .