1. The problem statement, all variables and given/known data How fast is a baseball with a mass of 145 g travelling if it has 94 J of kinetic energy? 2. Relevant equations m = 145 g or 0.0145 kg Ek = 94 J v = ? v = √2Ek/m 3. The attempt at a solution I get... v = √2(94)/0.0145 kg v = √12966 v = 114 But my book says it should be 36 m/s. What am I doing wrong? It also mentions that I need to recall that 1 J = 1 kg . m^2/s^2 but I am unsure how to incorporate this into the equation or if it is even necessary.