Two properties of frictional force.
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- Frictional force always acts parallel to two planes in contact with each other and in a direction opposite to that of relative motion of the two bodies. ..
- . Frictional force always decreases the relative motion between two bodies or surface.
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➡ ɪᴛ ɪs ᴀ sᴇʟғ ᴀᴅᴊᴜsᴛɪɴɢ ғᴏʀᴄᴇ.
➡ ɪᴛ ᴅᴇᴘᴇɴᴅs ᴏɴ ᴍᴀᴛᴇʀɪᴀʟ ᴏғ ᴛʜᴇ ʙᴏᴅʏ ᴘʀᴇsᴇɴᴛ ᴀᴛ ɪᴛs sᴜʀғᴀᴄᴇ.
➡ ɪᴛ ɪs ᴀ ɴᴀᴛᴜʀᴀʟ ғᴏʀᴄᴇ.
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