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带电粒子在电场中的运动也是每年高考中的热点问题,具体来讲有电场对带电粒子的加速(减速),涉及内容有力、能、电、图象等各部分知识,主要考查学生的综合能力.例1在与x轴平行的匀强电场中,一带电量为1.0×10~(-8)C、质量为2.5×10~(-3)kg的物体在光滑水平面上沿着X轴做直线运动,其位移与时间的关系是x=0.16t-0.02t~2,式中x以米为单位,t的单位为秒.从开始运动到5 s末
The movement of charged particles in the electric field is also a hot issue in the annual college entrance examination. Specifically, there is electric field acceleration (deceleration) of charged particles, which involves knowledge of various parts such as power, energy, electricity and image, and mainly examines students’ comprehensive abilities Example 1 In a uniform electric field parallel to the x-axis, an object with a charge of 1.0 × 10 -8 C and a mass of 2.5 × 10 -3 kg was made to make a straight line on the smooth horizontal plane along the X axis Movement, the displacement of the time relationship is x = 0.16t-0.02t ~ 2, where x in meters and t in seconds from the beginning of exercise to the end of 5s