Only an underdamped or an undamped system vibrates in the ab

Only an under-damped or an un-damped system vibrates in the absence of an external harmonic force. (B) The motion of a four-degrees-of-freedom system can be expressed completely using only two variables. (C) All damped systems will vibrate in the absence of a harmonic force. (a) Statements (A) and (B) only are correct. (b) Statement (A) only is correct. (c) None of the statements is correct. (d) Statement (B) only is correct. (e) Statement (C) only is correct.

Solution

option (b)