1.为什么同步卫星的轨道与地球赤道共面?假设卫星发射在北纬某地的上空的 B 点,其受力情况如图1所示,由于该卫星绕地轴做圆周运动所需的向心力只能由万有引力的一个分力 F_1提供,而万有引力的另一个分力 F_2就会使该卫星离开 B 点向赤道运动,除非另有一个力 F′恰好与 F_2平衡(但因 F′没有施力物体,所以 F′是不存在的),所以卫星若发射在赤道平面的上方(或下方)某处,则卫星在绕地 1. Why is the orbit of the geostationary satellite coplanar with the Earth’s equator? Assuming that the satellite is launched at point B above a certain point in northern latitude, its force is shown in Fig. 1. The centripetal force required for the satellite to orbit around the axis can only be It is provided by a force F_1 of gravitational attraction, and another component of gravitational force F_2 causes the satellite to move from point B to the equator, unless there is another force F′ that exactly balances with F2 (but because F′ has no force applied to it, So F’ does not exist, so if the satellite is launched above (or below) the equatorial plane, the satellite is orbiting