Hello, I would like some help with the following question. I highly appreciate your help ! A mass falls freely for 2.0 m before it hits a vertical spring. The mass sticks to the spring, and the system begins to oscillate with a period of 2.2 seconds. If you start a stopwatch when the mass is at the lowest point of the oscillation (and you set x = 0 at that point), where is the mass when the stopwatch reads 1.0 seconds? So, what I did is that I found (Phi not ø) to be ∏ ( pi ) but I am not very sure. I then used period to get ω. ω=2∏/T. Also, ω=√k/m . Therefore I could find the ratio k/m Then I used energy conservation so : mg(h+A) = 1/2 kA 2 I then rewrote it as k/m = ( 2g(h+A))/ A2 So I got the the amplitude. Then, I used x=Acos(wt+ø) I got the final answer to be 3.55 meters above the lowest point. I don't care about numbers as much as I care to get the concepts right and that I got ø right because I always have some trouble with finding it. Thank you !