1. The problem statement, all variables and given/known data A vertical spring (ignore its mass), whose spring constant is 875 N/m is attached to a table and is compressed down by .160 m. (a) What upward speed can it give to a .380 kg ball when released? 2. Relevant equations Conservation of Energy using 1/2 k x^2 for Uspring. 3. The attempt at a solution I get 7.68 m/s for the velocity and the book gets 7.47 m/s. Wanted to see who was right and if I'm doing something wrong.