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弹力做功对应的弹簧势能,分子力做功所对应的分子势能、电场力做功对应的电势能、重力做功对应的重力势能有区别,但也有相似.例如图1所示,固定的水平光滑金属导轨,间距为L,左端接有阻值为R的电阻,处在方向竖直,磁感应强度为B的匀强磁场中,质量为m的导体棒与固定弹簧相连,放在导轨上,导轨与导体棒的电阻均可忽略.初始时刻,弹簧恰处于自然长度,导体棒具有水平向右的初速度.在沿导轨往
The spring potential corresponding to elastic work, the molecular potential corresponding to the work of molecular force, the potential energy corresponding to the work of electric field, and the gravity potential corresponding to gravity work are different, but there are similarities, for example, as shown in Figure 1, the fixed horizontal smooth metal guide rail, The distance between the left end of the resistance is connected to the resistance R, in the vertical direction, the magnetic flux density of B uniform magnetic field, the mass of the conductor rod m is connected with the fixed spring, on the rail, rail and conductor bar Of the resistance can be ignored.At the beginning, the spring is just in the natural length, the conductor bar has a horizontal velocity to the right of the initial velocity