PHYSICS · Multi-part · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A mass–spring system has mass 0.5kg and spring constant 200Nm−1. The system is driven by a variable–frequency motor.
(i) Calculate the frequency at which the amplitude of oscillation is expected to be maximum.
(ii) The spring constant is then reduced by 20% while the mass remains the same. By what percentage does the resonance frequency change?