The mass weighs 50 lb. The spring constant is k = 200 lb/ft. and c = 10 lb-s/ft. If the ba...

The mass weighs 50 lb. The spring constant is k = 200 lb/ft. and c = 10 lb-s/ft. If the base is subjected to an oscillatory displacement xi of amplitude 10 in and frequency ωi = 15 rad/s, what is the resulting steady-state amplitude of the displacement of the mass relative to the base? (See Example 21.7.)