Final answer:
The force of gravity obeys an inverse square law, so if you triple the distance, the strength of the force will decrease to one ninth of its original strength.
Step-by-step explanation:
The force of gravity obeys an inverse square law, which means that the magnitude of the force decreases as the square of the distance between two objects increases. So, if you triple the distance, the strength of the force will decrease to one ninth of its original strength.