Question

How does the friction depend on the nature of the surface?​

Answer 1

Answer:

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Explanation:

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ǫᴜᴇsᴛɪᴏɴ →

ʜᴏᴡ ᴅᴏᴇs ᴛʜᴇ ғʀɪᴄᴛɪᴏɴ ᴅᴇᴘᴇɴᴅ ᴏɴ ᴛʜᴇ ɴᴀᴛᴜʀᴇ ᴏғ ᴛʜᴇ sᴜʀғᴀᴄᴇ?

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ᴀɴsᴡᴇʀ →

ғʀɪᴄᴛɪᴏɴ ᴅᴇᴘᴇɴᴅs ᴏɴ ᴛʜᴇ ɴᴀᴛᴜʀᴇ ᴏғ sᴜʀғᴀᴄᴇs ɪɴ ᴄᴏɴᴛᴀᴄᴛ. ғᴏʀ ᴀ ɢɪᴠᴇɴ ᴘᴀɪʀ ᴏғ sᴜʀғᴀᴄᴇs, ғʀɪᴄᴛɪᴏɴ ᴅᴇᴘᴇɴᴅs ᴜᴘᴏɴ ᴛʜᴇ sᴛᴀᴛᴇ ᴏғ sᴍᴏᴏᴛʜɴᴇss ᴏғ ᴛʜᴏsᴇ sᴜʀғᴀᴄᴇs. ᴛʜᴇ ғᴏʀᴄᴇ ᴏғ ғʀɪᴄᴛɪᴏɴ ɪs ɢʀᴇᴀᴛᴇʀ ɪғ ᴀ ʀᴏᴜɢʜ sᴜʀғᴀᴄᴇ ɪs ɪɴᴠᴏʟᴠᴇᴅ. ғʀɪᴄᴛɪᴏɴ ɪs ᴄᴀᴜsᴇᴅ ʙʏ ᴛʜᴇ ɪʀʀᴇɢᴜʟᴀʀɪᴛɪᴇs ᴏɴ ᴛʜᴇ ᴛᴡᴏ sᴜʀғᴀᴄᴇs ɪɴ ᴄᴏɴᴛᴀᴄᴛ.

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ɪ ʜᴏᴘᴇ ɪᴛ ᴡɪʟʟ ʜᴇʟᴘ ʏᴏᴜ✌

Answer 2

Friction depends on the nature of surfaces in contact. For a given pair of surfaces, friction depends upon the state of smoothness of those surfaces. The force of friction is greater if a rough surface is involved. Friction is caused by the irregularities on the two surfaces in contact.

Friction:

When you rub any two things together, this is called friction. It can be wiping a cloth across a table to wipe it clean or your boots as they skid along ice or snow.

Oil in a car engine lubricates the parts so they experience less friction. Friction causes heat, which can damage a car engine.

Friction is a force that holds back the movement of a sliding object. You will find friction everywhere that objects come into contact with each other.

In other words, friction is the resistance of motion when one object rubs against another. Anytime two objects rub against each other, they cause friction. Friction works against the motion and acts in the opposite direction.

Types of friction:

There are four types of friction. They are:

Static friction.
Sliding friction.
Rolling friction.
Fluid friction.
Let us learn about these frictions in detail.

Force of Friction

The force of friction always opposes the applied force.
Example: When a book is pushed on the surface of the table, the force of friction acts between the surface of the book and the surface of the table, in the direction opposite to the applied force.


Factors affecting Friction (NSP)

Factors affecting Friction (NSP):

Friction depends on the nature of surfaces in contact. For a given pair of surfaces, friction depends upon the state of smoothness of those surfaces.

The force of friction is greater if a rough surface is involved.
Friction is caused by the irregularities on the two surfaces in contact.
Irregularities on the two surfaces lock into one another.
In order to move any surface, a force needs to be applied to overcome interlocking.
Rough surfaces have large a number of irregularities.
Friction depends on how hard the two surfaces press together.

Type of Friction (St > Sl)

There are three types of friction that exist between solid surfaces. They are,

Static friction – a Frictional force that comes into action before the start of the motion of an object is called static friction.
Sliding friction -. When an object slides over another surface, the frictional force that comes into action is sliding friction.
Rolling friction.- The frictional force exerted when an object rolls over a surface is called rolling friction.
Fluid friction – The frictional force exerted by fluids when objects move through them is called fluid friction.
It is found that,

Rolling friction < sliding friction < static friction.


Friction : A Necessary Evil

Friction: A Necessary Evil:

Friction is necessary. Without friction:

No moving object would stop.
No building could be constructed.
We would not be able to write with pen or paper.
We would not be able to walk.
Friction is evil because:

Friction wears out the materials whether they are screws, ball bearings or soles of shoes.
Friction produces heat causing wastage of energy in machines.
Friction causes moving objects to stop or slow down.