 Write down the question, a ball is dropped from a high edge in the last second. It travels a distance of 9 inch by 25. Find out the edge. A ball is dropped from a high edge 9 inch by 25. Find out the edge. It travels a distance of 9 inch by 25. Find out the edge. It is dropped from a high edge 9 inch by 25. Find out the edge. Find out the edge. Find out the edge. Suppose I take the 10th second. Then total time of the journey starts the end. Solve it at any time. You have to find what is the last second. What it is? It is between this point and that point. She is not zero at this point. So, come forward. Last second of journey is. You remember this thing? What it like last second? Which second it is? Third second, fourth second, fifth second. What it is? Okay, now I will solve this. Yeah, wait. Ignore it. Example is proper. A lot of software is required. Fine, now I will do it. Distance travel and the second is 9 inch by 25. Okay, U is what? Zero? Half into A is 10, let us say. 10 into 2N minus 1. Okay? Yes or no? Edge is equal to? 250 by 2, which is 125. Okay, another question will come. The copy is from the board. So, we will take one more question. What? So, if you use edge, equation is G, U is zero. So, total time taken is 9 seconds. Okay, for that. This is wrong. Okay, can we put T equal to 1 second and S is equal to 9 inch by 25? And my initial logic will be zero. What is wrong here? T equal to 1 second. But the mission for it is to just reach the top of the tower. Understood? No, no. Listen to the question. From a four-hour tower, see if that's top. Okay? Can you find this velocity quickly? Find the velocity. Then I will tell you a complete question. G is, if you take G as 9.8 properly, a perfect square root will come. But you can take G as 10. But look at our respect. Right? Right, the equation? Then we take G as 10. You have a wish. You can take anything. I don't care what I answer. If you take that cookie, I will answer them. No. I will come and see how you have done it. So, the food of the tower is sufficient for it to reach the top of the tower. Forty-one? Yes, sir. Forty-one. Forty-one? Forty-one. I think it's a perfect square root. This is my initial point. This is U square plus 2A s minus 10. And displacement? Nineteen. So, U is under root of 19 to 20, one tower length accurate, which is 42.5 meter per second. Okay? But this was not the question. Listen to the question. Two seconds later, once you throw the stone from the bottom of that velocity, two seconds later, another stone is dropped from the top of the tower. Other stones end later. After you... if they are moving in the same straight line. How long will it take? What did you point out? Something is coming. Now, you might appreciate that it is almost made to say that carry mechanics. All the chapters and mechanics are played personally. They are... 70,000 of the syllabus and mechanics are laid out. Should I give you a hint? Ah, I'll see those again. What? What's funny, sir? I'll give a small hint. See, guys, in two seconds, it would already travel some distance this stone. Okay? So, let's say that distance you have found it as X1. So, the remaining distance is 90 minus X1. X1 you can find out on the object if velocity is this much. In two seconds, how much it travels? You can find... 65. This is bigger than that. Come on, go ahead. Okay, guys, 62, 63.5, whatever it is. You can write down half 80 square U is 42.5. This is equal to minus half 12. So, like this, you get it 65. 35. All okay with this? Understood? I'm following you. So, let's do... 25. I'm going to clean. What's going to be cleaning? Yeah, close. What is it? It's a root 5 centimeter. Huh? Root 5 centimeter. Root 5 centimeter. No. Can you write down the equation and show it to me? I don't care what the final answer is. Just write down the equation and show it to me. Let me know what's your thought. Write the equation and show it to me. So, I don't want the final answer. No, it's not coming from the final answer. It's coming from the final answer. Can you write down the equation? I'm going to do my own equations. Don't calculate them. Just show me the equations. X and Ix. Which one? You take 26 here. Do you want to write the last one? Yes, 22. And then... Correct. Same? First one is the last one. The last one is the last one. We just have to do that. I have the first stone. It is covered 65 meters. After 65 meters, you can read both the stones are in together. So, my timer is zero. After the first second, I can reset the timer so that this T minus 2 T plus 2 R. Write the equations now. Now, I'm going to do two sets. One set is that after two seconds, the object will reach from point A to point B. This object, nothing is happening. Till two seconds. Yes or no? Second ball is dropped from point C. Now, I am separating these two events. So, I'll be for the first ball. The first ball, when I... then minus half G is there into T square. Right? But velocity... Initial velocity. Minus 10 into 2. So, I'm getting it as 22.5 meter per second. So, this UB is 22. So, you have to solve these two equations. If you add these two equations, you'll see that 2.5 is the answer.