相距20m的两小球A.B沿同一直线同时同向向右运动,A球以2m/s的速度做匀速运动,B球以2.5m/s的加速度做匀减求B球的初速度vB为多大时,B球才能不撞上A球
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![相距20m的两小球A.B沿同一直线同时同向向右运动,A球以2m/s的速度做匀速运动,B球以2.5m/s的加速度做匀减求B球的初速度vB为多大时,B球才能不撞上A球](/uploads/image/z/13309545-57-5.jpg?t=%E7%9B%B8%E8%B7%9D20m%E7%9A%84%E4%B8%A4%E5%B0%8F%E7%90%83A.B%E6%B2%BF%E5%90%8C%E4%B8%80%E7%9B%B4%E7%BA%BF%E5%90%8C%E6%97%B6%E5%90%8C%E5%90%91%E5%90%91%E5%8F%B3%E8%BF%90%E5%8A%A8%2CA%E7%90%83%E4%BB%A52m%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E5%81%9A%E5%8C%80%E9%80%9F%E8%BF%90%E5%8A%A8%2CB%E7%90%83%E4%BB%A52.5m%2Fs%E7%9A%84%E5%8A%A0%E9%80%9F%E5%BA%A6%E5%81%9A%E5%8C%80%E5%87%8F%E6%B1%82B%E7%90%83%E7%9A%84%E5%88%9D%E9%80%9F%E5%BA%A6vB%E4%B8%BA%E5%A4%9A%E5%A4%A7%E6%97%B6%2CB%E7%90%83%E6%89%8D%E8%83%BD%E4%B8%8D%E6%92%9E%E4%B8%8AA%E7%90%83)
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