Define unit vector, null vector and position vector?
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ᴜɴɪᴛ ᴠᴇᴄᴛᴏʀ:ᴀ ᴠᴇᴄᴛᴏʀ ᴡʜɪᴄʜ ʜᴀs ᴀ ᴍᴀɢɴɪᴛᴜᴅᴇ ᴏғ ᴏɴᴇ. ɴᴜʟʟ ᴠᴇᴄᴛᴏʀ:ᴢᴇʀᴏ ᴠᴇᴄᴛᴏʀ ᴏʀ ɴᴜʟʟ ᴠᴇᴄᴛᴏʀ ɪs ᴀ ᴠᴇᴄᴛᴏʀ ᴡʜɪᴄʜ ʜᴀs ᴢᴇʀᴏ ᴍᴀɢɴɪᴛᴜᴅᴇ ᴀɴᴅ ᴀɴ ᴀʀʙɪᴛʀᴀʀʏ ᴅɪʀᴇᴄᴛɪᴏɴ. ᴘᴏsɪᴛɪᴏɴ ᴠᴇᴄᴛᴏʀ:ᴘᴏsɪᴛɪᴏɴ ᴠᴇᴄᴛᴏʀ ɪs ᴛʜᴇ ᴠᴇᴄᴛᴏʀ ᴡʜɪᴄʜ ʀᴇᴘʀᴇsᴇɴᴛs ᴛʜᴇ ᴘᴏsɪᴛɪᴏɴ ᴏғ ᴀ ᴘᴏɪɴᴛ ɪɴ ᴀ sᴘᴀᴄᴇ ᴡɪᴛʜ ʀᴇsᴘᴇᴄᴛ ᴛᴏ ᴛʜᴇ ᴏʀɪɢɪɴ.❤
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unit vector :the vector which has magnitude one
null vector :the vector whuch has magnitude and direction zero .
position vector, straight line having one end fixed to a body and the other end attached to a moving point and used to describe the position of the point relative to the body
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