What evidence would have been needed to contradict the theory of gravity before it was proven to be a law?(1 point)

Question

Responses

Experiments demonstrating that objects of different masses fall at different rates in a vacuum.
Experiments demonstrating that objects of different masses fall at different rates in a vacuum.

Discovery of a force stronger than gravity that acts universally on all matter.
Discovery of a force stronger than gravity that acts universally on all matter.

Observations of objects floating upwards without any external force.
Observations of objects floating upwards without any external force.

Consistent measurements showing that the gravitational constant varies significantly on Earth.

Answer 1

To contradict the theory of gravity before it was proven to be a law, observations of objects floating upwards without any external force would have provided strong evidence against the validity of gravitational theory. This would indicate that there is an anomaly in the behavior of mass in the presence of gravity, suggesting that gravity as a force is not universally acting in the expected manner. The other options, while relevant to understanding gravity and other forces, would not directly refute the existence or basic principles of gravity in the same compelling way.