1.一质点沿x轴运动,运动方程为x=8t-2t2,式中x的单位为m,t的单位为so在t=1s到t=3s的时间内,质点的路程s=( )A.2m B.4mC.6m
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![1.一质点沿x轴运动,运动方程为x=8t-2t2,式中x的单位为m,t的单位为so在t=1s到t=3s的时间内,质点的路程s=( )A.2m B.4mC.6m](/uploads/image/z/8571206-38-6.jpg?t=1%EF%BC%8E%E4%B8%80%E8%B4%A8%E7%82%B9%E6%B2%BFx%E8%BD%B4%E8%BF%90%E5%8A%A8%2C%E8%BF%90%E5%8A%A8%E6%96%B9%E7%A8%8B%E4%B8%BAx%3D8t-2t2%2C%E5%BC%8F%E4%B8%ADx%E7%9A%84%E5%8D%95%E4%BD%8D%E4%B8%BAm%2Ct%E7%9A%84%E5%8D%95%E4%BD%8D%E4%B8%BAso%E5%9C%A8t%3D1s%E5%88%B0t%3D3s%E7%9A%84%E6%97%B6%E9%97%B4%E5%86%85%2C%E8%B4%A8%E7%82%B9%E7%9A%84%E8%B7%AF%E7%A8%8Bs%3D%EF%BC%88%E3%80%80%E3%80%80%E3%80%80%EF%BC%89A%EF%BC%8E2m++++++++++++++++++++++++++++++++++++++++++++++++++++++++B%EF%BC%8E4mC%EF%BC%8E6m)
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