Show that the effective mass of the oscillating system is approximately meff = 256 g. hint: use the temporal angular frequency 5.77 rad/s. how does your effective system mass compare to the mass of the hanging object, m = 200 g?
y=0.11 m
edit: i'm not sure what other information is missing. the equation used for the coordinate system is y(t) = y cos(ω t +φ0 ) = (0.105m)cos 5.77 rad/s t + (−1.30 rad). i know that temporal angular frequency=sqrt(k/msys), but i'm not sure where k comes from or if that's even what is being asked here.