Write two properties of frictional force.
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1. Frictional force always act parallel to two plane in contact with each other and in a direction opposite to that of relative motion of the two bodies. 2. Frictional force always decreases the relative motion between two bodies or surface.
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➡ ɪᴛ ɪs sᴇʟғ ᴀᴅᴊᴜsᴛɪɴɢ ғᴏʀᴄᴇ.
➡ ɪᴛ ᴅᴇᴘᴇɴᴅs ᴏɴ ᴍᴀᴛᴇʀɪᴀʟ ᴏғ ᴛʜᴇ ʙᴏᴅʏ ᴘʀᴇsᴇɴᴛ ᴀᴛ ᴛʜᴇ sᴜʀғᴀᴄᴇ.
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