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题目.如图1所示,质量为M,半径为R的两个均匀金属球,内部均挖出一个半径为1/2R的球形空腔,球腔与球内切,两球心间距离为d.求两球间万有引力的大小.[1]原参考答案:两个质量均匀分布的球体间的万有引力,可以等效为质量集中于球心的两个质点间的万有引力;而实心球体又可看成是由半径为R/2的实心球体与挖去
Title as shown in Figure 1, the mass M, radius R of the two uniform metal balls, were dug inside a radius of 1 / 2R spherical cavity, ball cavity and the ball cut, the distance between the two centers for the d Seek the size of the gravitational force between the two balls [1] The original reference answer: The two gravities uniformly distributed between the sphere of gravity, can be equivalent to the mass concentrated in the center of gravity of the two particles between the gravitational; and solid sphere can see Into a radius of R / 2 by the solid sphere and dug