Consider again the motion of a simple pendulum. The equation of motion involves it should, although the coordinate is dimensionless. I am unable to understand how to put the equation of the simple pendulum in the generalized coordinates and generalized momenta in order to check if it is or not a Hamiltonian System. Since it is one dimensional, use arc length as a coordinate. Since radius is ﬁxed, use the angular displacement, θ, as a generalized coordinate. Generalized coordinates. Simple pendulum via Lagrangian mechanics by Frank Owen, ... where q signifies generalized coordinates and F signifies non-conservative forces acting on the ... are 0. Problem 5: Simple pendulum Choose θ as the generalized coordinate for a simple pendulum. So we … The force of gravit… The aforementioned equation of motion is in terms of as a coordinate, not in terms of x and y. Watch Queue Queue. Watch Queue Queue English: Simple nonlinear pendulum, instead of using both x and y coordinates, only the angle is needed to uniquely define the position of the pendulum. The constraint is the tension in the pendulum rod. This video is unavailable. What is an appropriate generalized momentum, so that its time derivative is equal to the force? What is the engineering dimension of the generalized momentum. Draw phase space trajectories for the pendulum: periodic motion corresponds to closed trajectories. The kinetic energy is T = (1/2)mv2 = (1/2)ml2θ˙2 1 − = 3.1 Simple Pendulum We have one generalized coordinate, θ, so we want to write the Lagrangian in terms of θ,θ˙ and then derive the equation of motion for θ. Explanation:When writing the equations of motion for the simple pendulum, why do textbooks always choose θ to be the generalized coordinate? The force of gravity is in the y-direction so wouldn't it be When writing the equations of motion for the simple pendulum, why do textbooks always choose $\theta$ to be the generalized coordinate? The generalized coordinates of a simple pendulum are the angular displacement θ and the angular momentum ml 2 θ.Study, both mathematically and graphically, the nature of the corresponding trajectories in the phase space of the system, and show that the area A enclosed by a trajectory is equal to the product of the total energy E and the time period τ of the pendulum.