Question

When two bodies are colliding:

• A. Both should be in physical contact with each other all the time.
• B. Both should be in physical contact with each other at least once.
• C. Both may or may not be in physical contact.
• D. Both should not be in physical contact with each other.

Answer 1

The correct option is C Both may or may not be in physical contact.

In a collision, particles may or may not be in physical contact. Even a non-contact force can cause impulse.