Question

What is the cause of friction?

Answer 1

Answer:

the opposite force acting on a body causes friction.....

ex:- when we ride bicycle then the road apply a force which is agaist our cycle... so we have to paddle for run against the force....

hope it's helpful

Answer 2

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Friction is a force that resists the relative motion between two objects or materials.

The causes of this resistive force are:

• Molecular adhesion.
• Surface roughness.
• Deformations.

Intermolecular forces are responsible for friction. Roughness of the surface also contributes for friction.