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在进行高三物理教学中遇到了这样两道题.题1.(2013届合肥市二轮检测题)质量为m的人造地球卫星在地面上受到的重力为P,它在到地面的距离等于地球半径R的圆形轨道上运动时(A)速度为((2PR)/m)~(1/2).(B)周期4π((mR)/P)~(1/2).(C)动能为1/4PR.(D)重力为0.题2,(2009年海南高考题)近地人造卫星1和2绕地球做匀速圆周运动的周期分别为T_1和T_2,设在卫星1、卫星2各自所在的高度上的重力加速度大小分别为g_1和
In the third year physics teaching encountered such two questions .To 1. (2013 Hefei second round of test questions) The quality of m artificial Earth satellite on the ground by the gravity of P, its distance to the ground is equal to the earth (B) period 4π ((mR) / P) ~ (1/2) (C) when the circular path of radius R is moving at a speed of (2PR) / m) Kinetic energy of 1 / 4PR (D) gravity of 0. Question 2, (2009 Hainan Entrance Examination) near-Earth artificial satellite 1 and 2 do circular motion around the Earth uniform cycle T_1 and T_2, respectively, located in satellite 1, satellite 2 The magnitudes of the gravitational acceleration at their respective heights are g_1 and, respectively