如图所示轻弹簧的劲度系数为k小球的质量为m平衡时小球在a位置.今用力f将小球�下压缩x至b位置.则此时弹簧的弹力大小为 A.mgb Template




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tomski如图所示轻弹簧的劲度系数为k小球的质量为m平衡时小球在a位置.今用力f将小球�下压缩x至b位置.则此时弹簧的弹力大小为 a.mgb coloring