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A pair of toy cart wheels are rolled obliquely from a smooth surface onto two plots of grass—a rectangular plot and a triangular plot—as shown. The ground is on a slight incline, so that after slowing down in the grass, the wheels will speed up again when emerging onto the smooth surface. Complete the sketches, and show some positions of the wheels inside each plot and on the other side of each plot, thereby indicating the direction of travel.
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