1. The problem statement, all variables and given/known data A 2.10 kg bucket containing 13.0 kg of water is hanging from a vertical ideal spring of force constant 130 N/m and oscillating up and down with an amplitude of 3.00 cm. Suddenly the bucket springs a leak in the bottom such that water drops out at a steady rate of 2.00 g/s. When the bucket is half full, find the rate at which the period is changing with respect to time. 2. Relevant equations T=2[itex]\pi[/itex]sqrt(Ʃm/k) 3. The attempt at a solution I know that I need to find T as a function of t, then take the derivative wrt t and evaluate it at the time when the bucket is half full. But I'm not sure how to set this up.. I tried: T=2[itex]\pi[/itex]sqrt[(m1+m2+Δmt)/k] where m1=2.1 kg, m2=13 kg, and Δm=0.02 kg/s but it seems to be the wrong set-up. Anyone have any ideas? Also, when the bucket is half full, is t=(half the mass of water)/(0.02 kg/s)=6.5/0.02=325 seconds? Is this the t that we should evaluate the derivative at? (assuming we figure it out first :tongue2:) Thanks for helping!