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等效及其在解高考题中的应用裴家量（西北工业大学附中，７１００７２）一、等效重力场的应用匀强电场与重力场有两个极为相似的特性：第一，场强的大小和方向恒定．电场强度：大小为Ｅ＝Ｆ／ｑ＝Ｕ／ｄ，方向与正电荷受力方向一致．重力场强度：ｇ＝Ｇ／ｍ方向竖直向下．...
Equivalence and its application in solving college entrance examination questions Jia Jialiang (Affiliated to Northwestern Polytechnical University, 710072) I. Application of Equivalent Gravity Field The uniform electric field and gravity field have two extremely similar characteristics: first, the magnitude of the field strength and The direction is constant. Electric field strength: The size is E=F/q=U/d, the direction is consistent with the direction of the positive charge. Gravity field strength: g = G/m direction is straight downward. ...