Originally posted by 神秘比卡超 at 2004-4-23 10:25 AM: 我也覺得是A。 throw的動作含 A. Kinetic energy throw後,氣球才產生 B. Potential energy 這裡不包含 C. Heat energy 沒有出現 D. Chemical energy
Originally posted by smallpotato226 at 2004-4-24 12:54 PM: 意味著動能下降.....不是很對...本身地心吸力把它向下拉....你把它向上拋....互相抵消jor......so 動能下降......ng關位能事.......只是位能和動能一個上升...一個下降....令你產生錯誤的因果關係~~