___________ is a force, which always opposes the motion of one body over the other body in contact with it.
Frictional force
Normal force
Gravitational force
Reaction force
Frictional force is a force, which always opposes the motion of one body over the other body in contact with it.
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.
Friction is a force which opposes relative motion between two surfaces in contact with each other.
Friction is a force which always opposes the motion.Justify
Which of the following is/are true about the frictional force?
1. It acts between all moving objects.