Which of the following statements define friction appropriately?

A force that resists the motion of surfaces.

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A force that resists the relative motion of surfaces.

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A force that does not depend on the nature of the surface.

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A force that is non-contact in nature.

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Solution

The correct option is B A force that resists the relative motion of surfaces.
Friction force is a contact force. Friction does not resist the motion of surfaces. Instead it resists the relative motion of the surfaces. Friction depends on many factors like the nature of the surface, weight of the object on the surface etc.

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Similar questions

Q. Both viscosity and friction that oppose relative motion, arise from intermolecular forces and depend on the nature of surfaces in contact.

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.

Q. Prove that the force of friction depends on the nature of two surfaces in contact.

Q. Which of the following statements are correct about frictional force?
1. It is a non-contact force.
2. It is a contact force.
3. It opposes the relative motion beteween the surfaces in contact.

(a) Given examples to show that firction depends on the nature of two surfaces in contact.
(b) Give an example to show that friction depends on the force with which the two surfaces are pressed together.

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