Physics

Problem

Four pairs of small spheres are listed below with their centre-to-centre separations. Neglect all forces except mutual gravitation. Which pair will experience the greatest gravitational attraction? a)

6\,\text{kg}

and

7\,\text{kg}

separated by

3\,\text{cm}

8\,\text{kg}

and

9\,\text{kg}

separated by

5\,\text{cm}

3\,\text{kg}

and

3\,\text{kg}

separated by

1\,\text{cm}

4\,\text{kg}

and

5\,\text{kg}

separated by

2\,\text{cm}

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