In this situation, it is given that the ball is dropped from rest from the top of a 40 m building and a second ball is strong downward. One second letter. So let this is the building and the ball is dropped from this building from rest, so its initial velocity is zero After one second another ball is brought. Let it initial velocities human, which we have to find. And the height of the building is given to us, that is 40 m. Oh for the first part we have given data that is for first of all, initial velocity, U. Is zero and displacement as is 40 m. So first of all, I am calculating the time taken by this vegetable to reach the bottom of the building, so by equation of motion as equals to U. T. Plus half duty square over here. S. S. 40. This is your A plus half into 10 into peace. Where from here we get the time T. That is 2.828 seconds. So this is the time taken by the first ball to reach the bottom of the building. Now it is told that second ball is dropped after one second, so second ball is thrown after one second and it will reach the ground at the same time. So it has to cover the same distance in 1.828 seconds. So for second world time is 2.828 minus one, That is 1.828 seconds. So it has to cover the distance in 1.828 seconds, for which we have to find its initial velocity. So, from equation of motion as is equal to U. T. Last half. Gt square here. S. Is 40. You will have to find these. 1.828 That's half G sten. And please, 1.828 whole square from here we get initial velocity Youtube. That is one that is 12.7 m per second. So the 50 velocity of the second ball by which it is dropped. So this is the answer of our question. Fuck! Now! In the second part we have to find the issue of the speed of the throne ball to the speed of the other when they hit the ground. So first of all we have to calculate the velocity of these balls when they hit the ground. So first of all, and calculating the final velocity of first of all. Mhm. Or which I am using equation of motion, which this B equals two. You plus gT. Now put all the data in this equation so initial velocity U. Is zero plus then into time taking this 2.828 So here we can. Final velocity that is the one is equals to 28.28 m per second. This is the velocity of first of all by which it hits the ground. Similarly for second ball again using the equation of motion, we two is equal to youtube plus jean two T. Here we do. Is the velocity of the second ball by which it hits the ground. You too, is this initial velocity which we had already calculated? That is 12.7? Yes, this is 10 into nine point sorry, turning to this is time, which is 1.828 After following this, we get we do that is 30.98 meter per second. So this is the velocity of the second ball by which it hits the ground. Now we have to find the ratio of these two. So we even by way too is equals two. We have to find the two by everyone, so we do 30.98 device. This is 28.28 so this issue becomes 1.1. But this is the final answer of this fusion. Thank you.