00:01
All right, so let's say we have a stress versus strain curve like this, where our stress is measured in millions of pascals, and it kind of looks like this, and it goes off this way.
00:15
So this strain distance, if we look at it, is about like 0 .02 or 0 .001 meters.
00:25
Or better yet, let's just, let's take data where we have a clear indication.
00:26
So this is about 0 .02 .0 .01 meters.
00:26
Or better yet, let's just, let's take data where we have a clear indication.
00:29
So this is about 0.
00:32
01 on our strain axis and then the stress at that point should be about a hundred million pascals so young's modulus then is going to be the stress over the strain um so write this as a hundred million pascales over 0 .001 and so we should get um looking at everything actually sorry from looking from the chart i misread it it's about 200 so it'll be twice as value so we could write this as 200 gigapascals.
01:09
And then for part b, we want to know what is the proportionality limit.
01:13
So that's the strain where this is no longer linear...