A nonuniform horizontal bar of mass m is supported by two massless wires against gravity. The left wire makes an angle α with the horizontal, and the right wire makes an angle β. The bar has length l. (figure 1).

With any turning vehicle, the rear wheels follow a shorter path than the front wheels. the longer the vehicle is, the greater the difference will be. truck drivers initially swing out before making a turn. what isn't shown in this illustration is as car straightens out, the front wheels must travel a greater distance and the tail end drags on the shortest path.

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