PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A mass–spring system has a natural frequency of 15Hz. It is kept vibrating by a periodic force of frequency 14.5Hz. The steady-state amplitude compared with that at exact resonance will be
(a) the same as at resonance
(b) much larger than at resonance
(c) slightly smaller but still relatively large
(d) essentially zero because the frequencies do not match