What is the work done by ᴀ ᴡᴇɪɢʜᴛ ʟɪғᴛᴇʀ ᴡʜᴇɴ ʜᴇ ʜᴏʟᴅ ᴀ ᴡᴇɪɢʜᴛ ᴏғ ᴋɢ ᴏɴ ʜɪs sʜᴏᴜʟᴅᴇʀs ғᴏʀ ᴍɪɴᴜᴛᴇ. ᴡʜʏ?
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