第1次 我放左張瓦通紙係個磅下面
102磅
第2次 我拎走左張紙(即係個磅下面咩都無)
103.5
我重覆試過好多次
都係無紙個個既result > 有紙個個
而且唔係淨係今日,
留意左e個問題好耐,不過無諗個點解
我想問個source of error係咩?
更新1:
個balance得出的result係depends on force exerts on it. if force acts on the balance increases,normal reaction acts on you increases,so the reading increases.
更新2:
你既意思 係咪即係話"force acts on balance by you"唔係全部acts左落個balance到 有d acts 左落張紙到,所以 force acts on the paper + balance by you= force acts on paper by you+ force acts on balance by you(廢話= =) 而你既weight 係fixed,所以force acts on balance decreases 所以,normal reaction acts on u decreases,即係個reading decreases?
更新3:
如果係咁,我有問題想問 If balance下面咩都無,得地板 force acts on space under you by you = force acts on balance by you + force acts on the floor by you 因為有air trapped in the paper,所以瓦通紙會吸左d力,咁個地板會唔會吸左d力?