Question

o bara metalica are forma unei prisme triunghiulare regulate cu lunginmea laturii bazei de 10cm si inaltimea de 1 m .calculatu masa barei ,stiind ca desitatea metalului este de 7600kg\m

Answer 1

[tex]V_{prismei}=A_b\cdot{h}\;;\;l_b=10cm\;=\;(10:100)=0,10m\;\surd\surd\\ A_b=\frac{l_b^2\sqrt3}{4}\;\rightarrow\;A_b=\frac{1\cdot\sqrt3}{100\cdot4}\approx1,73:400=0,004325m^2\surd\surd\\ m_{bar\u{a}}\,=\,0,004325\cdot7600=32,87kg[/tex]