题目:
在光滑绝缘的水平面上,带负电的小球甲固定不动,带异种电荷的小球乙以一定初速度沿光滑绝缘的水平面向甲运动,则小球乙( )
A.加速度变小,速度变小
B.加速度变大,速度变小
C.加速度变大,速度变大
D.加速度变小,速度变大
答案:
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