Hello, welcome to yet another tutorial for FISMO 2. This one is now on the second preview release of FISMO 2 which I have just released on the internet today on the 6th of July. So we will begin by starting with the demonstration. So today we are going to be demonstrating the usage of FISMO 2 workout and inelastic collision. The details around and inelastic collision. So we will just find the video. Here it is here. We will open that one and the directory will go to this one to expand the video. And here we are. So each cart is almost half a kilo. It is 515 grams each. There is the blue cart left and one on the right. And we will just play this video to show what happens in it. So it is an inelastic collision. There is magnets that are here which hold these two carts on this air track together. After this what will happen is that they end up effectively doubling their mass. So a double of the mass is effectively a halving of the speed. As with usual video motion analysis we have a 1 meter ruler here which we can use to calibrate. So let's start. We zoom in so we can get a good view of what we are looking at. We can click and drag our first point. We can click and drag our second point. And we know that this is 1 meter. 1 set calibration. So now another feature that has been introduced with this one, this version of FISMOs, we can set the axis. So we have a y axis and an x axis. So I am going to set those so that they are relatively making sense about, let's say here, so that it is through the middle of the air track. This also gives us something to have a good guide from. And we will start plotting. We will go back to the start. We will zoom in. Now occasionally what happens with videos that have been shown on the fluorescent light is this difference in the frequency the fluorescent light flickers at versus that of the video that is taken. So a 50 Hz or 60 Hz depending on which country you are in, over electricity will create this kind of phasing effect here. And this can be very difficult as to where to place your plot points. So we will take a look at this feature here that is called Show Edges. When we click this, although it is slightly slower, because it is quite an intensive image production, it finds the edges of each frame in a reliable and predictable manner that we can use to then track. So we will just quickly plot a few points out. Here, keeping in mind that the edge detection only works when you have got good contrast. We can see to make sure that it is roughly what we are wanting. It is telling us that the edge of this image is here. So we are back to our edges. We will move along. We are almost at the collision. Now we will have a look to make sure that that looks correct. Back to the edges and advance. Again, nearly at the collision. Now.