1. The problem statement, all variables and given/known data A ball whose mass is 8kg travels at a velocity [PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png22,79,6[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngm[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmmi10/alpha/144/char3D.pngs. [Broken] What is the rest energy of the ball? 2. Relevant equations K=1/2 mv^2 3. The attempt at a solution K=1/2 (8) v^2 Im not sure what to do with velocity since its in vector form, I tried taking the magnitude of it but that was incorrect.