1. The problem statement, all variables and given/known data A 1.50 kg object is held 1.20 m above a relaxed, massless vertical spring with a force constant of 320 N/m. The object is dropped onto the spring. 2. Relevant equations (a) How far does the object compress the spring? (0.381m) (b) How far does the object compress the spring if the same experiment is performed on the moon, where g = 1.63 m/s2? (0.143m) (c) Repeat part (a), but now assume that a constant air-resistance force of 0.700 N acts on the object during its motion. (0.371m) 3. The attempt at a solution I have all the answers already (in parenthesis), but I need help on how to find them. For A I tried I found velocity with Vf^2=Vi^2+2ad; Vf=Sqrt(2*9.8*1.2); Vf=4.8497 - K+U=K+U - 0 + .5kx^2 = .5mv^2 + 0 - x = Sqrt(m/k)*v - x = .332, which isn't the right answer, but Im not sure where I went wrong.