如图所示小球在竖直�下的力f作用下将竖直轻弹簧压缩若将力f撤去小球将�上弹起并离开弹簧直到速度为零时为止则小球在上升过程中 A Template




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tomski如图所示小球在竖直�下的力f作用下将竖直轻弹簧压缩若将力f撤去小球将�上弹起并离开弹簧直到速度为零时为止则小球在上升过程中 a coloring