Question

Two floating bottles with magnets repel each other at first, but attract when one magnet is reversed. What does this experiment demonstrate?

Options

• Contact forces require physical contact

• Friction acts along surfaces

• Non-contact forces can act without direct contact

• Muscular force depends on body weight

Answer 1

Non-contact forces can act without direct contact

Explanation:

The change in motion of the bottles (from repulsion to attraction) occurs without any physical contact between them. This demonstrates that non-contact forces (magnetic force) can act across a distance and influence the motion of objects.