At this stage your MCAT preparation, step back and look at basic mechanics as a whole (Kinematics, Dynamics, Work, Energy & Power).

Taking Kinematics aside, which describes motion, what you see within these four topics are two basic conceptual frameworks for describing the behavior of mechanical systems, for describing interactions. The two frameworks are represented by the concepts of Dynamics (Newton's Laws) and the concepts of Work, Power & Energy.

The basic challenge of Mechanics is learning to interpret and describe the mechanics of systems in terms of dynamics and in terms of energy.