Question

Which of the following is/are true about frictional force?

1. It depends on the nature of the surface in contact.

2. It always opposes relative motion between two objects.

3. It is a contact force.

4. It is a non- contact force.

• A. 1, 3 and 4
• B. 1 and 3
• C. 2, 3 and 4
• D. All of the above

Answer 1

The correct option is C

2, 3 and 4

Friction is a force that opposes the relative motion between two objects. Since two surfaces need to be in contact, for friction to come into action, it is a contact force. It depends on the nature of surfaces in contact. It is more for rough surfaces.