1. The problem statement, all variables and given/known data In the figure below, a block of mass m = 11 kg is released from rest on a frictionless incline angled of angle θ = 30°. Below the block is a spring that can be compressed 2.0 cm by a force of 270 N. The block momentarily stops when it compresses the spring by 5.4 cm. http://www.webassign.net/halliday8e/pc/halliday8019c08/halliday8019c08-fig-0045.htm" [Broken] (a) How far has the block moved down the incline to this stopping point? m (b) What is the speed of the block just as it touches the spring? m/s 3. The attempt at a solution I have already attained the correct answer for part A. The problem i'm having is with part B. I'm pretty confused with the distances that i should be using to solve this problem. After setting up the relationship Ugrav(o)=Ugrav(1) + K(1) = E(spring) i decided that the way i would attain velocity at the instant before it hits the spring would be through this equation: V^2=[K(d+x)^2]/m -2gd for K i plugged in (270/.02) for d+x i plugged in .3652m and for d i plugged in .3652m-.054m. I feel like this is on the right track but if this equation is missing something, some advice would be highly appreciated! If this is in fact the right equation, then the problem i'm having is with the distances. I cant figure out is how i should go about attaining the values (d+x) and d. I understand that one of these values should be the length acquired in part a (.3652m), but i'm not sure which one. This i believe should be d+x, but what is d by itself? Basically i keep getting the same damn answer and its just wrong!