1. The problem statement, all variables and given/known data An object moves with a velocity of [4 m/s,-1 m/s, 3 m/s] and is acted on by a force of [-5 N, 0, +5 N]. What is the power of the energy transfer in this interaction? a. -35 W b. -5 W c. 0 d. +5 W e. +35 W 2. Relevant equations p = Fv 3. The attempt at a solution Okay, so I'm trying to find p, and I'm given Fv, and I know that p = Fv. The problem is that it's invalid to multiply these two matrices. So what do I do? I don't know how to multiply these two three-dimensional vectors? What do I need to do first?