stress and strian help

[limber sinew]

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[fading sage]

Pls help me with stress and strain

[split parcel]

@fading sage asking an engineering question to a math server haha. You got the definitions wrong stress is force/area strain is elongation/initial length

Also you got the area of the circle wrong

A=πd²/4 , d diameter

[echo bone]

Isn't the area of a circle pi*r^2?

Oh wait nvm they equal the same thing.

[fading sage]

Yeah but it's mostly maths

Yeah my circle area is right

Pie r² is the same as pie d

[split parcel]

Oh i see i thought you wrote $A=\pi 2\cdot 5^2$ but you meant $\pi(2.5)^2$

[lunar quarry]

Altair

[split parcel]

So yeah only the stress and strain definitions then.

[fading sage]

@split parcel can you please work one of those out as an example for me

[fading sage]

I understand all this

But what is the X in the box all about

What does that symbol mean