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例如图一所示,AB是圆的竖直直径,长为d,AC是光滑的弦轨道,现让小物体(质点)从A点由静止开始,沿着AC弦轨道下滑到C点,求物体的运动时间。
For example, as shown in Figure 1, AB is the vertical diameter of a circle of length d, AC is a smooth chordal orbit, now let small objects (particles) start from rest at point A and glide along AC chord orbit to point C Object movement time.