A bob of mass m is suspended from a fixed point with a massless string of length L (i.e., it is a pendulum). You are to investigate the motion in which the string moves in a cone with half-angle θ
Draw the free body diagram for the bob. I find it most helpful to draw the diagram at the point when the bob is at its right-most position. At this point in its motion, all the forces are in the plane of the paper.
Include the net force vector.