论文部分内容阅读
1.如图1所示,在水平面上O处放一带电量为-5×10~(-8)Q、质量为10g的绝缘小物块,物块与水平面间的摩擦系数为0.2。过O点且垂直于水平面建立y轴,y轴右侧区域有一与纸面平行且垂直于y轴的匀强电场,场强方向水平向右,大小为6×10~5N/Q。现沿电场方向给物块一个2m/s的初速度,求物块最终停止在什么位置。(g=10m/s~2)
1. As shown in Figure 1, place a small piece of insulating material with a charge of -5x10 - (-8)Q and a mass of 10g on the horizontal plane O. The coefficient of friction between the block and the horizontal plane is 0.2. The y-axis is established at the 0 point and perpendicular to the horizontal plane. The right side of the y-axis has a uniform electric field parallel to the paper plane and perpendicular to the y-axis. The field strength is horizontal to the right, and the size is 6×10~5N/Q. Now give an initial velocity of 2m/s to the block in the direction of the electric field, and find out where the block stops. (g=10m/s~2)