Gravitational interaction creates attraction between objects.

Please research the interaction between these two drugs.

He is good at producing new ideas.

Strong interaction is one of the four fundamental forces in particle physics.

Fundamental interaction is one of the most important forces in physics.

Electromagnetic interaction is one of the fundamental forces used to explain the force between substances.

Weak interaction is one of the four fundamental forces between elementary particles.

What is this object?

The Earth's gravity pulls us towards the ground.

The gravity of the Earth is stronger than the gravity of the Moon.