Question

what is a friction ?? ​

Answer 1

Explanation:

Fɪᴄᴛɪᴏɴ ɪs ᴛʜᴇ ғᴏʀᴄᴇ ʀᴇsɪsᴛɪɴɢ ᴛʜᴇ ʀᴇʟᴀᴛɪᴠᴇ ᴍᴏᴛɪᴏɴ sᴏʟɪᴅ sᴜʀғᴀᴄᴇs , ғʟᴜɪᴅ ʟᴀʏᴇʀs , ᴀɴᴅ ᴍᴀᴛᴇʀɪᴀʟ ᴇʟᴇᴍᴇɴᴛs sʟɪᴅɪɴɢ ᴀɢᴀɪɴsᴛ ᴇᴀᴄʜ ᴏᴛʜᴇʀ . ᴛʜᴇʀᴇ ᴀʀᴇ sᴇᴠᴇʀᴀʟ ᴛʏᴘᴇs ᴏғ ғʀɪᴄᴛɪᴏɴ : Dʀʏ ғʀɪᴄᴛɪᴏɴ ɪs ᴀ ғᴏʀᴄᴇ ᴛʜᴀᴛ ᴏᴘᴘᴏsᴇs ᴛʜᴇ ʀᴇʟᴀᴛɪᴠᴇ ʟᴀᴛᴇʀᴀʟ ᴍᴏᴛɪᴏɴ ᴏғ ᴛᴡᴏ sᴏʟɪᴅ sᴜʀғᴀᴄᴇs ɪɴ ᴄᴏɴᴛᴀᴄᴛ..

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Answer 2

$\bf\: Friction$

Push your pencil box on a table. Does it stop after moving for some distance or does it keep on moving? Now, push the pencil box from the opposite direction. What happens now?

A Friction In both the cases, the pencil box will stop after moving for a short distance. This is because the force applied in the opposite direction by the object in contact opposes the movement of the pencil box on the table, hence, it stops. Thus, we can say that the force which always opposes the motion of one object over another object that is in contact with it, is called friction. Friction occurs between the two surfaces which are in contact with each other. Hence, friction can be defined as a force that opposes the direction of motion. In other words, for friction to occur, some 'external' force must be applied on the object.