Grandmother 82869

Grandma wanted to fry steaks for lunch. So she went to buy a large piece of meat. Calculate the knife's contact area with the meat if the grandmother cut with a force of 220 N and exerted a pressure of 1.83 MPa.

Correct answer:

S =  120.2186 mm²

Step-by-step explanation:

$$\begin{gathered} F=220\text{N} \\ p=1.83\cdot 10^6=1830000\text{Pa} \\ p=F/S \\ {S}_1=F/p=220/1830000=\frac{11}{91500}\doteq 0.0001{\text{m}}^2 \\ S=S_1\to {\text{mm}}^2=S_1\cdot 1000000{\text{mm}}^2=0.0001\cdot 1000000{\text{mm}}^2=120.219{\text{mm}}^2=120.2186{\text{mm}}^2 \end{gathered}$$

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