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将引力与物体质量和物体之间的距离相关联。Relate the gravitational force to masses of objects and distance between objects.
解释牛顿第三定律的引力。Explain Newton's third law for gravitational forces.
使用测量值来确定普遍引力常数。Use measurements to determine the universal gravitational constant.
涉及知识点:
万有引力
Inverse Square Law
一对力
牛顿第三定律