| 1 | The law of gravity. | |
| 2 | Another approach is to compute the gravitational forces involved. | |
| 3 | When it does, gravity will cause the sun' s core to contract. | |
| 4 | His ground breaking research allowed Sir Isaac Newton to come up with the theory of gravity. | |
| 5 | She is a force of gravity in her long gray dress. |
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