Question

Laws of static friction??

Answer 1

Answer:

1. The magnitude of limiting friction depends upon the nature of the surfaces in contact; and on their roughness. It is independent of the area of contact between the bodies.

2. The force of static or limiting friction is tangential to the surfaces in contact and is directed opposite to the direction in which the force tries to move the body.

3. The magnitude of the limiting friction 'f' is directly proportional to the normal reaction 'N' between the surfaces in contact.

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Answer 2

Answer:

frictional force of friction is a force which come into existence when two body in contact have relative motion or tending to have relative with respect to each other and opposed the motion.

Characteristics of friction

1. force of friction is always opposite to the force causing the relative motion between the surface.
2. force of friction always Act at the point of contact of the two surface.
3. add the force causing motion increase the friction force increases up to certain maximum value and that maximum value of the force of friction is called limitungg friction .
4. the friction fore is independent of the area of contacts.
5. the friction force depends on the nature of material of surface in contact.
6. frictional force depends on lubricantaion.