1.分解矢量中学物理中涉及的矢量有力、速度、加速度、电场强度、磁感应强度等.同学们只习惯于对力进行分解,但在某些问题中,通过分解除力之外的其它矢量来求解,会收到事半功倍的效果. 例1 一带正电的小球质量为m=1×10-2kg,带电量为q=1 ×10-2C,小球在相互垂直的匀强电场和匀强磁场的空间中沿一斜线向下做匀速直线运动,如图1所示.已知其水平分速度为vr 1. Decomposition vector Vector strength, speed, acceleration, electric field strength, magnetic induction, etc., which are involved in middle school physics. Students are only used to decompose forces, but in some problems, they are divided by vectors other than the decompression force. Solving, you will get a multiplier effect. Example 1 The mass of a positively charged ball is m=1×10-2kg, and the charge quantity is q=1×10-2C. The ball is perpendicular to each other and the uniform electric field and uniform strength In the magnetic field space, a uniform linear motion is performed along a diagonal line, as shown in Fig. 1. It is known that the horizontal velocity is vr.