This final paper contains two branches of mechanics, namely kinematics and dynamics. The aim of the final paper is to solve the given tasks in the field of kinematics and dynamics. The first part in the field of kinematics explains the basic theorem of solid-state kinematics, coplanar motion, the instantaneous center of displacement and velocity, and the velocity plan. The task involved solving the rod system using a velocity plan (graphical and analytical method). The second part of the final paper deals with the dynamics in which the concepts are explained: moment of inertia of body mass and law of conservation of mechanical energy. The given task is to study the motion of a rigid body held by a spring. It was necessary to determine the stiffness of the spring and the order of compression of the spring under which the body would stop. In the first task for the construction system in the drawing, it is necessary to calculate the angular velocities and velocities of the points using the velocity plan. Vector control of the solution In the second task, it is necessary to determine the stiffness of the spring associated with the moving body and to determine the number of compression of that spring before the body stops (approximately)