 I have a setup in front of me. Let's first look at this setup right here. So this is a half cut plastic bottle. There is some water in it. And I've made a hole in the plastic bottle with the help of a scissor. You can warm up a scissor from a candle and make a hole in plastic. And I've attached a straw in that hole. I've also filled some water in the bottle. And I've made sure the level of the water is right to the point where the hole is. I also have a small poly bag. Now apart from this, I have a glass slab which is tied to the end of this weighing scale that you can see over here. I will first measure the weight of the glass slab. So as you can see, take a look at the reading on the left. This is 1 Newtons. That is the weight of the glass slab. Now I will insert this glass slab in the water. And when I do so, just have a look at all the water that is being collected in the poly bag. I will now take a reading of the weight of the glass slab when it is inside the water. So this comes out to be almost equal to it's between 0.5 and 0.6. So let's take it as 0.55. Now as we can see that the weight of the glass slab has reduced and it has reduced by 0.45 Newtons. This means there must be a force of 0.45 Newtons acting in the upward direction on the glass slab. Now I will take the weight of the empty poly bag. This is 0.2 Newtons. And now I will take the weight of the poly bag with water. This is between 0.6 and 0.7. So let's take it as 0.65. Now we can see that the weight of the water collected in the poly bag is 0.45 Newtons. Which is the same as the buoyant force that was acting on the glass slab when it was inside the water. So what does this mean? This means that the buoyant force acting on any object which is inside water is equal to the weight of the liquid that it displaces. And the object can be completely inside the water. It can be partially inside the water as well. In both the cases there will be some displaced liquid. And in both the cases there will be some weight of that displaced liquid. So buoyant force that acts on object which is completely inside or partially inside any liquid equals the weight of the displaced liquid.