This chapter shifts from analyzing net changes before and after interactions to examining the details of interactions over time. By focusing on time-dependent changes in motion, work, and impulse, we ...This chapter shifts from analyzing net changes before and after interactions to examining the details of interactions over time. By focusing on time-dependent changes in motion, work, and impulse, we build on our understanding of forces. This approach allows us to predict precise motion outcomes based on net force, expanding beyond general conservation laws to explore dynamic processes in detail.