1. Problem Description: A massless spring hangs from the ceiling with a small object attached to its lower end. The object is initially held at rest at a position y. The object is then released from y and oscillates up and down, with its lowest position being 10cm below y. What is the frequency of the oscillation? 2. Relevant equations F=kx; w= sqroot k/m ; f= w/2pi ; 3. I know that the right answer to the problem is 2.2 Hertz and I know how you could solve it using energy however I was wondering why the following does not give me the right answer. Is my math just wrong or is it a conceptual problem? My Way: F=kx mg = kx ; x= .1m mg = k (.1) (9.8 /.1) = k/m k/m = 98 w = sq-root k/m w = sq-root (98) w = 9.89 f = w/(2pi) f= (9.89)/(2pi) f= 1.57 Hz This is obviously not the right answer. I hope you can give me an explanation as to why it's not. Thanks in advance!