如图所示物体a与b叠放在一起a与弹簧相连并放在光�水平轨道上组成一个弹簧振子b靠与a间的静�擦力随a一起振动由于ba间静�擦力有 Template




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tomski如图所示物体a与b叠放在一起a与弹簧相连并放在光�水平轨道上组成一个弹簧振子b靠与a间的静�擦力随a一起振动由于ba间静�擦力有 coloring