Question

list the main properties of force of friction?​

Answer 1

Answer:

1. It always acts in the direction opposite to the direction of motion.

2. It's magnitude is equal to that of the force trying to set the object in motion only until it starts to move. Once the object starts to move the force is constant. The former form of friction is called static friction and the latter is kinetic friction.

3. It is a non-conservative force I.e. the energy spent to overcome friction is lost to the surroundings as heat.

4. It is caused because of the irregularities on the surface of the objects. These deformities (at atomic level) on two objects interlock with each other. Since two objects cannot touch each other (Pauli's exclusion principle) they come into equilibrium due to electromagnetic forces.

5. It depends on the normal reaction between the two surfaces under consideration and also on the nature of the surfaces.

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Answer 2

$\tt\huge\bold\blue{Answer} -$

$\tt\bold\purple{Main \: properties \: of \: friction} -$

• Friction is produced only when one body is made to move upon another body.

• Friction always try to slow down an object or stops it from moving.

• Friction always works in the direction opposite to the direction the object is moving.

• Friction wears off the surface of contact of two bodies.

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$\tt\bold\purple{Additional \: information} -$

• A force that opposes motion between two objects that are in contact with each other is called friction.

• Smoother surfaces exhibit less friction , rougher surfaces exhibit more friction.

• The main cause of friction is the presence of irregularities (unevenness) on the two surfaces in contact.

• The magnitude of force of friction depends on the nature of the surfaces which is in contact and the weight of the sliding body.

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