1. The problem statement, all variables and given/known data A spring with k = 40.0 N/m is at the base of a frictionless 30.0° inclined plane. A 0.50 kg object is pressed against the spring, compressing it 0.4 m from its equilibrium position. The object is then released. If the object is not attached to the spring, how far up the incline does it travel before coming to rest and then sliding back down? 2. Relevant equations I tried to use the formula (1/2)kx2=mgh 3. The attempt at a solution I tried (1/2)(40)(.4)2=.5(9.8)h, solving for h. The first time I worked it out, I got h=.65306. I tried entering .65, .653, .7 3 separate times into my homework website, and they were all incorrect. I tried working the problem out again, and got h=15.68. I tried submitting 15.7 and 16 as answers, and they were both incorrect as well. If anyone can offer any insight, it would be greatly appreciated. Thanks!