【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
一艘帆船在湖面上顺风行驶,在风力的推动下做速度,v 1=4m/s的匀速直线运动,已知:该帆船在匀速行驶的状态下突然失去风的动力,帆船在湖面上做匀减速直线运动,经过8秒种才能恰好静止;该帆船的帆面正对风的有效面积为S=10m 2,帆船的总质量M约为940kg,当时的风速v 2=10m/s。若假设帆船在行驶的过程中受到的阻力始终恒定不变,那么由此估算: (1)有匀速行驶的状态下,帆船受到的动力为多大? (2)空气的密度约为多少?
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参考答案:
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参考解析:
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