Question

Giúp với ạ

Answer 1

TH1: 

S = 5.6 = 30(cm²) = 3.10^-3(m²)

F = 10.m = 10 . 0,84 = 8,4(N)

=> p = F/S = 8,4/3.10^-3 = 2800(Pa)

TH2:

S = 6.7 = 42(cm²) = 4,2.10^-3

F = 10.m = 10 . 0,84 = 8,4(N)

=> p = F/S = 8,4/4,2.10^-3 = 2000(Pa)

TH3:

S = 5.7 = 35(cm²) = 3,5.10^-3(m²)

F = 10.m = 10 . 0,84 = 8,4(N)

=> p = F/S = 8,4/3,5.10^-3 = 2400(N)

 

Answer 2

\(TH1:\\ S=5.6=30\left(cm^2\right)=3.10^{-3}\left(m^2\right)\\ F=10.m=10.0,84=8,4\left(N\right)\\ p=\dfrac{F}{S}=\dfrac{8,4}{3.10^{-3}}=2500\left(Pa\right)\)

\(TH2:\\ S=6.7=42\left(cm^2\right)=4,2.10^{-3}\left(m^2\right)\\ F=10.m=10.0,84=8,4\left(N\right)\\ p=\dfrac{F}{S}=\dfrac{8,4}{4,2.10^{-3}}=2000\left(Pa\right)\)

\(TH3:\\ S=5.7=35\left(cm^2\right)=3,5.10^{-3}\left(m^2\right)\\ F=10.m=10.0,84=8,4\left(N\right)\\ p=\dfrac{F}{S}=\dfrac{8,4}{3,5.10^{-3}}=2400\left(Pa\right)\)

Answer 3

áp lực 3 trường hợp đều bằng trọng lựơng vật:

F₁=F₂=F₃=P=10.m=8,4N

TH1:

áp xuất trường hợp là:

\(P_1=\dfrac{F_1}{S_1}=\dfrac{P}{S_1}=\dfrac{8,4}{0,05\times0,06}=2800N\)/m²

TH2

áp xuất trường hợp là:

\(P_2=\dfrac{F_2}{S_2}=\dfrac{P}{S_2}=\dfrac{8,4}{0,06\times0,07}=2000N\)/m²

^TH3:

áp xuất trường hợp là:

\(P_3=\dfrac{F_3}{S_3}=\dfrac{P}{S_3}=\dfrac{8,4}{0,05\times0,07}=2400N\)/m²