gc physics textbook chapter 5 problems (id: d2eab4577)

本题目来源于试卷: gc physics textbook chapter 5 problems，类别为 IB物理学

[填空题]
Four 1.0-kg masses are8m)6q;rlpsfwyc i -1p located at the corners of a square 0.50 m on eachohps4gw6py ( g/h o03d side. Find the magnitude and direction of the gravitational force on a fifth 1.0-kg mass placed at the midpoint of the bottom side of sd(owh/0yg go3p 6 4hpthe square.    $\times {10}^{-10}$  ----待选择----downupward 

参考答案:
空格1: 3.8±2%  空格2: upward 


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