A 200g mass on the end of a spring is pulled back 3 cm and released. There is a coefficient of friction between the table and mass of 0. The resonant...

A 200g mass on the end of a spring is pulled back 3 cm and released. There is a coefficient of friction between the table and mass of 0.7. The resonant frequency is 7.071 rad/sec.A) What is the frequency of oscillation?B) What driving force would be needed to keep that mass oscillating at the original amplitude?C) NOw that it is being driven by a driving force that leads the oscillator by pi/4 rad, where is the oscillator at t=0.5 sec?