八年级暑假作业[物理]请标题号并写出过程!1.甲船在河道内航行的速度为18km/h,从A地出发半小时后,乙船以7m/s的速度也由A地出发沿同一河道同向行驶.则:⑴乙船出发多长时间后追上甲船?⑵乙船
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![八年级暑假作业[物理]请标题号并写出过程!1.甲船在河道内航行的速度为18km/h,从A地出发半小时后,乙船以7m/s的速度也由A地出发沿同一河道同向行驶.则:⑴乙船出发多长时间后追上甲船?⑵乙船](/uploads/image/z/1709372-20-2.jpg?t=%E5%85%AB%E5%B9%B4%E7%BA%A7%E6%9A%91%E5%81%87%E4%BD%9C%E4%B8%9A%5B%E7%89%A9%E7%90%86%5D%E8%AF%B7%E6%A0%87%E9%A2%98%E5%8F%B7%E5%B9%B6%E5%86%99%E5%87%BA%E8%BF%87%E7%A8%8B%211.%E7%94%B2%E8%88%B9%E5%9C%A8%E6%B2%B3%E9%81%93%E5%86%85%E8%88%AA%E8%A1%8C%E7%9A%84%E9%80%9F%E5%BA%A6%E4%B8%BA18km%2Fh%2C%E4%BB%8EA%E5%9C%B0%E5%87%BA%E5%8F%91%E5%8D%8A%E5%B0%8F%E6%97%B6%E5%90%8E%2C%E4%B9%99%E8%88%B9%E4%BB%A57m%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E4%B9%9F%E7%94%B1A%E5%9C%B0%E5%87%BA%E5%8F%91%E6%B2%BF%E5%90%8C%E4%B8%80%E6%B2%B3%E9%81%93%E5%90%8C%E5%90%91%E8%A1%8C%E9%A9%B6.%E5%88%99%3A%E2%91%B4%E4%B9%99%E8%88%B9%E5%87%BA%E5%8F%91%E5%A4%9A%E9%95%BF%E6%97%B6%E9%97%B4%E5%90%8E%E8%BF%BD%E4%B8%8A%E7%94%B2%E8%88%B9%3F%E2%91%B5%E4%B9%99%E8%88%B9)
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