Question

What is friction ? Explain in details.​

Answer 1

Answer:

Friction is the force that opposes the relative motion between the two surfaces in contact with each other.

The force which slows down the motion of a moving body in contact with the surface of another body is called frictional force or force of friction. This force always opposes the motion.

Answer 2

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What is friction ?

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Friction

When we throw a ball on the floor it starts moving with some velocity. But once it is rolled ideally no force is acting in the direction of motion and according to Newton’s first law the ball should keep on rolling but this does not happen. The ball stops after moving a certain distance so as force must be acting on it. That force is known as friction.

Friction is defined as the resistance offered by the surfaces that are in contact with each other when they move over each other.

Friction works in the opposite direction in which the body is moving making the body slow down. Friction is useful in most of the cases. Friction is also dependent on external factors.

What Causes Friction?

When we see any object, we can see the smooth surface but when the same object is viewed under a microscope, it can be seen that even the smooth appearing object has rough edges. Tiny hills and grooves can be seen through the microscope, and they are known as irregularities of the surface.

So, when one object is moved over the other, these irregularities on the surface get entangled giving rise to friction. More the roughness, more will the irregularities and greater will be the force applied.

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Hope it helps you :)