In everyday language, people say 〝a bag of sugar weighs 1 kg.〞.This statement is wrong in physics.What should they say?
《new physics at work1B P. 118 #5》
幫我呀＞＜謝
physics功課問題＞＜
2007-02-04 7:47 pm
回答 (4)
2007-02-04 8:00 pm
✔ 最佳答案
The statement is wrong because the unit of the weight is kilogramforce. It should be said in physics "the mass of sugar is 1 kg". In physics experiment, it never weights the sugar with the bag. It only weight the sugar.
參考: From my study
2007-02-04 7:57 pm
從W=mg 一式中得知
重量(W)是由質量(m)及重力加速度(g)相乘得出的
而物理中，只有質量(m)的單位為kg的。
而因g為一加速度,故重量(W)亦可表達成W=ma
根據公式F=ma,得知W為力(Force)
故重量(W)的單位應為N,而不是kg
重量(W)是由質量(m)及重力加速度(g)相乘得出的
而物理中，只有質量(m)的單位為kg的。
而因g為一加速度,故重量(W)亦可表達成W=ma
根據公式F=ma,得知W為力(Force)
故重量(W)的單位應為N,而不是kg
參考: 本人於中文中學就讀的，抱歉不能以英文為閣下解答
2007-02-04 7:54 pm
A bag of sugar weighs 10N.(on earth)
2007-02-04 7:53 pm
kg is a measure of mass, not weight.
They may say, "A bag of sugar has 1 kg".
They may say, "A bag of sugar has 1 kg".
收錄日期: 2021-04-12 21:57:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070204000051KK01203