1. The problem statement, all variables and given/known data A toy company hires you to construct a device that uses a small spring to launch 15 g foam pellets. The spring requires an average force of 5.70 N to compress it 1.30 cm. Determine the speed of one of the foam pellets as it leaves the spring. 2. Relevant equations Ep=-Ek 3. The attempt at a solution EP=-EK EP=MGH EP.015(9.81)(.013) EP=.0019 EK=-.0019 V=SQRT(EK2/M) V=SQRT(-.0019)(2)/.015 I know this is wrong as you cannot square a negative number. I dont understand where the force given in this equation comes in to play either.