 Hello and welcome back to another episode of Physics Partner. Today we are going to explore the concept of work, power and efficiency. Using the mighty crane as our key example, work is defined as a transfer of energy resulting from the application of force over a distance. Imagine an object moving against an opposing force. The work done is the product of the force exerted on the object and the distance it moves in the direction of that force. You can see the basic formula, units and necessary information on your screen. Moving on to the power, it's the rate at which work is done or the amount of work done per unit time. In simpler terms, it tells us how quickly something is being accomplished. Power is calculated by dividing the work done by the time it takes to do it. Let's compare two cranes to understand the concept of power in physics. Imagine two cranes lifting the same weight to the same height. The first crane takes 10 seconds to complete the task while the second crane takes 20 seconds. So first crane will be considered as powerful. You can see the basic formula, units and necessary information on your screen. Now let's talk about efficiency. Efficiency measures how well a system converts input energy into useful work output. In simple terms, the machine is more efficient if the wasted energy is less. You can see the basic formula, units and necessary information on your screen. So let's finally discuss the Sankey diagram. A Sankey diagram is a visual representation used to represent the flow of energy. It consists of arrows that represent energy input, energy losses and useful energy output. The width of the arrows is proportional to the quantity of the energy flow. Sankey diagrams are particularly useful when the amount of energy in each of the energy source is known as they provide a clear visualisation of how energy is transferred from one source to another. Let's consider a construction site where time is money. A crane with higher power would enable quick lifting and placement of materials, increasing productivity. Furthermore, an efficient crane ensures that the least amount of energy is wasted during operations, making it cost effective and environmental friendly. So today we have explored the mind boggling concept of work, power, efficiency and Sankey diagram using the crane as our example. We have understood how work is the transfer of energy, power quantifies work over time and efficiency is the key of optimizing output. So the next time you see a crane in action, appreciate the physics behind it. So I think it's enough for today. So thank you very much for listening and watching. I hope you enjoyed the video. I hope this video is useful for you. So take care of yourself and don't hesitate to write an email if you have any questions, queries, suggestions and even classes are required. Take care of yourself. Meanwhile, see you in the next video. Goodbye.