1. The problem statement, all variables and given/known data A spring that has a spring constant of 2000 N/m is compressed 5 centimeters from its rest position. If a 2.5kg block is placed on the edge of the spring and then released, what will the block's kinetic energy be once it has completely left the spring? How fast will the block be moving? Spring Constant: 2000 N/m Spring Compression: 5cm Block Mass: 2.5kg Assumed Gravity Force: 10m/s^2 2. Relevant equations KE = 1/2mv^2 SpringForce = (SpringConstant)(SpringCompression) 3. The attempt at a solution I entered in the values of the spring constant to find the force of the spring, multiplying 2000 by 5, getting an answer of 10,000N for the force of the spring. Then I moved to put this information into the second equation, for kinetic energy, and realized that I'm missing something in between. The two questions that are included in this problem actually go together. Once I find one, I should be able to find the other (I think). To find the kinetic energy of the block however, don't I need the velocity? And vice versa? Thanks in advance!