[Vật lí 8] bài tập cơ

N

nhoxken_cucumber

Ta có:
[tex]P_{Fe}=P_{Al} \\ \Leftrightarrow d_{Fe}V_{Fe}=d_{Al}V_{Al} \\ \Rightarrow \frac{V_{Al}}{V_{Fe}} = \frac{d_{Fe}}{d_{Al}}[/tex]
Mà [tex]d_{Fe}>d_{Al}[/tex] \Rightarrow [tex]V_{Al}>V_{Fe}[/tex] \Rightarrow [tex]F_{A_{Al}} > F_{A_{Fe}}[/tex]
 
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