A particle moves on a frictionless surface along a path as shown in Fig. 5.81. (The figure gives a view looking down on the surface.) The particle is initially at rest at point A and then begins to move toward B as it gains speed at a constant rate. From B to C, the particle moves along a circular path at a constant speed. The speed remains constant along the straight-line path from C to D. From D to E, the particle moves along a circular path, but now its speed is decreasing at a constant rate. The speed continues to decrease at a constant rate as the particle moves from E to F; the particle comes to a halt at F. (The time intervals between the marked points are not equal.) At each point marked with a dot, draw arrows to represent the velocity, the acceleration, and the net force acting on the particle. Draw longer or shorter arrows to represent vectors of larger or smaller magnitude.

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в D. F.