00:01
Hello everyone.
00:02
In this problem we're asked to find the elastic energy stored in the mechanism of a scalp that helps the organism spring its mouth back open.
00:14
So what we're told is that we have this graph of the restoring force versus the compression of this mechanism, which kind of acts like a coil.
00:27
So this mechanism is kind of like a spring.
00:30
If you think about it.
00:31
Okay.
00:32
So this is what we should be thinking about.
00:36
And so we're told that when the compression occurs, it's going to be, the spring is going to be compressed by 0 .15 millimeters, which is 0 .15 times in 3 meters.
00:49
Now from the graph, we can see that there is a maximum restoring force, which is 2 .5 units.
00:56
And this occurs at a compression of 0 .20 or 0 .2 times 10 to minus 3 meters.
01:04
Okay? and so the reason why that's useful is because what we want to do is we want to calculate this pes, right? but remember that pes or the elastic energy stored in a spring is equal to half times the spring constant times the compression or stretch squared...