030卫星(天体)追及相遇模型 精讲精练-2022届高三物理一轮复习疑难突破微专题
030卫星(天体)追及相遇模型一.必备知识如果有两颗卫星在同一轨道平面内两个不同轨道上同向绕地球做匀速圆周运动,a卫星的角速度为ωa,b卫星的角速度为ωb,某时刻两卫星正好同时通过地面同一点正上方,相距最近,如图甲所示,则当它们转过的角度之差Δθ=π,即满足ωaΔt-ωbΔt=π时,两卫星第一次相距最远,如图乙所示。两卫星相距最远的条件是ωaΔt-ωbΔt=(2n+1)π(n=0,1,2,3…),相距最近的条件是ωaΔt-ωbΔt=2nπ(n=0,1,2,3…)。二.经典例题精讲例 如图所示,A、B两颗人造地球卫星在同一平面不同圆轨道上同向运行。设它们运行的周期分别是T1、T2,某时刻两卫星相...
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