如图所示物体p与竖直放置的轻质弹簧相连处于静止现对p施一竖直�上的拉力f使其�上运动至弹簧恢复原长的过程中 A.力f对物体做的功等于物体 Template




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tomski如图所示物体p与竖直放置的轻质弹簧相连处于静止现对p施一竖直�上的拉力f使其�上运动至弹簧恢复原长的过程中 a.力f对物体做的功等于物体 coloring