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与天体运动相关的知识点和题型,在高考试题中属于必考内容。笔者围绕与之相关的知识、问题展开天体运动问题解题的论述。一、万有引力、重力和向心力一般情况下,物体会受到万有引力F_万和地面的支持力~,在两者合力下,物体会有相应的向心力做随着地球自转的圆周运动,万有引力可分解为两个分力,即一个提供向心力,一个为物体自身所承受的重力。万有引力为物体的圆周运动所提供的向心力,通常在0.3%以下,所以在相关的解题步骤中,如果题
The celestial body movement related knowledge point and the type, in the entrance examination question belongs to must examine the content. I focus on the related knowledge, the problem of celestial movement problem solving discussion. I. Gravitation, Gravity and Concentric Force Under normal circumstances, objects will be supported by universal gravitation F_ and the ground ~ Under the joint efforts of both, the object will have the corresponding centripetal force to do the circular motion with the rotation of the Earth. The gravitational force can be decomposed into Two components, namely one to provide centripetal force and one to bear the gravity of the object itself. Gravitation is the centripetal force provided by the circular motion of the object, usually below 0.3%, so in the relevant problem-solving step, if the problem