All points on the body move in parallel paths (either rectilinear or curvilinear).
The chapter begins by introducing the concept of rigid body kinematics, which involves the study of the motion of rigid bodies without considering the forces that cause the motion. The key concepts covered in this section include:
$$a_B = a_A + \alpha \times r_B/A - \omega^2 r_B/A$$
just download the PDF and turn it in. Your professor has the same manual. They know when you skip steps.
By combining rigorous solution manuals (used ethically), the step-by-step framework outlined above, and disciplined practice, you will not only pass your dynamics course—you will excel. Remember: Every expert was once a student who struggled with relative acceleration. The difference is they didn’t stop at the answer. They asked why .