| [ POSTECH ] in KIDS 글 쓴 이(By): guest (callosum) <jasmine.waisman.> 날 짜 (Date): 2001년 11월 7일 수요일 오전 09시 26분 56초 제 목(Title): Re: 물체의 무게와 관련된 질문이예요 think yourself as a ruler. you wouldn't know whether one hand is moving or both hands are moving. hence they should give you the same result no matter how many hands are moved. QED. ^^ |