“逆风扬帆行舟”是个古老有趣的问题.趣在虽然顶风(即使正顶风),船仍能前进．逆风扬帆行舟,原理复杂,涉及到风对帆的作用机制、船体形状、水对船的阻力、船与帆的配合、受风力作用帆的形状等多种因素．本文在不涉及风与帆的作用机制的简化处理的条件下,忽略了船体形状、受风力作用帆的形状等次要因素的影响,对“逆风扬帆行舟”力学原理作一简析,可得到跟实际情况相符的结果．希望起到启迪中学生应用物理知识解决生活中实际问题的作用．下面分旁顶风、正顶风两种情况论述．一、船受旁顶风“逆风扬帆行舟”的原理 “Hurricane sailing against the wind” is an old and interesting problem. Interesting in the wind (even if it is the top wind), the ship can still advance. The wind is sailing against the wind, the principle is complex, involving the mechanism of the wind on the sail, the shape of the hull, the resistance of the water to the ship, the cooperation of the ship and the sail, the shape of the sail affected by the wind and other factors. This article does not involve the simplification of the wind and sail mechanism of action, ignoring the influence of secondary factors such as the shape of the hull, the shape of the sail affected by the wind, and a brief analysis of the mechanics of the “wind sailing against the wind” principle. Get results that match the actual situation. I hope to play an important role in enlightening middle school students to apply physics knowledge to solve practical problems in life. The following is a discussion of the top wind and top wind. First, the principle of the boat being “wind against the wind and sailing in the wind” by the side wind