考测点导航浮力是初中物理知识中的难点,把浮力与压强、密度、二力平衡、三力平衡综合起来,又成为初中物理力学中重点综合题,在中考压轴题中会频频出现。学习浮力时,知道液体对浸在其中的物体,具有竖直向上的托力。这个托力叫做浮力。理解阿基米德原理:浸在液体里的物体受到竖直向上的浮力,浮力的大小等于被物体排开的液体受到的重力。理解阿基米德原理公式:F浮=G排 The navigation buoyancy at the test point is a difficult point in the physics of junior middle school. Combining buoyancy with pressure, density, balance between two forces, and balance of three forces has become a key comprehensive problem in junior middle school physics and mechanics, and it will appear frequently in the final exam topics. When learning buoyancy, it is known that the liquid has a vertical upward force on the object immersed therein. This force is called buoyancy. Understand Archimedes’s principle: objects immersed in liquid are subject to vertical upward buoyancy, and the buoyancy force is equal to the gravity of the liquid discharged by the object. Understanding Archimedean principle formula: F float = G row