(1)G 杯 =mg=0.2千克×9.8牛/千克=1.96牛,F(xiàn) 浮 =G 杯 =1.96牛。
(2)設(shè)杯子浸入水中的深度為h 1 ,F(xiàn) 浮 =G 排 =ρgSh 1 ,∴h 1 =

=(1.96牛)/(1×10 3 千克/米 3 ×9.8牛/千克×20×10 -4" />

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歡迎您訪問(wèn)“曹沖稱象”是家喻戶曉的典故。某興趣小組模仿這一現(xiàn)象,制作了一把“浮力秤”。將厚底直筒形狀的玻璃杯!

“曹沖稱象”是家喻戶曉的典故。某興趣小組模仿這一現(xiàn)象,制作了一把“浮力秤”。將厚底直筒形狀的玻璃杯

更新時(shí)間:2021-12-13 09:59:56作者:admin2

解:
(1)G 杯 =mg=0.2千克×9.8牛/千克=1.96牛,F(xiàn) 浮 =G 杯 =1.96牛。
(2)設(shè)杯子浸入水中的深度為h 1 ,F(xiàn) 浮 =G 排 =ρgSh 1 ,∴h 1 =

=(1.96牛)/(1×10 3 千克/米 3 ×9.8牛/千克×20×10 -4 米 2 )=0.1米
(3)當(dāng)杯子下沉的深度為h 2 =25×10 -2 米時(shí)
F 浮 ′=ρgSh 2 =1×10 3 千克/米 3 ×9.8牛/千克×20×10 -4 米2×25×10 -2 米=4.9牛,能稱量的最大值F=F 浮 ′-G 杯 =4.9牛-1.96牛=2.94牛。

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