This document discusses work, power, simple machines, and machine efficiency. It defines work as a force acting through a distance. Power is the rate at which work is done or the amount of work per unit of time. Simple machines include the inclined plane, wedge, lever, wheel and axle, screw, and pulley. Machine efficiency is the ratio of work output to work input. Friction causes machines to have efficiencies below 100% by wasting energy as heat. The mechanical advantage of a machine is how many times it multiplies the effort force.
Adventure in Science is about exploring our world by doing. Each Saturday during the school year we have hands-on sessions hosted by local experts on some aspect of science or engineering that they find exciting or interesting. During these sessions the students get to experiment with the tools or ideas involved to better understand how they really work. Sometimes those ideas can grow into something new and make a difference in the world. Who says science isn't fun?
During this session we taught kids about the physics of simple machines.
http://www.adventureinscience.org/
Adventure in Science is about exploring our world by doing. Each Saturday during the school year we have hands-on sessions hosted by local experts on some aspect of science or engineering that they find exciting or interesting. During these sessions the students get to experiment with the tools or ideas involved to better understand how they really work. Sometimes those ideas can grow into something new and make a difference in the world. Who says science isn't fun?
During this session we taught kids about the physics of simple machines.
http://www.adventureinscience.org/
Teaches students about work & its measurements to physics, ranging from grades 6-8 grades. Also, teaches the difference between simple and compound machines, for example, inclined planes. Finally, teaches students how work can be understood as energy & efficiency.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
2. Work Weight Lifting Force Work- A force acting through a distance. The distance that the object moves must be in the same direction as the force applied to the object. What force is having to be overcome by the lifting force? Movement Distance
3. Work Weight Lifting Force Work- A force acting through a distance. The distance that the object moves must be in the same direction as the force applied to the object. What force is having to be overcome by the lifting force? Weight! Movement Distance
4. Work Pushing Force Distance Moved Work- A force acting through a distance. The distance that the object moves must be in the same direction as the force applied to the object. What force is having to be overcome by the pushing force?
5. Work Pushing Force Distance Moved Work- A force acting through a distance. The distance that the object moves must be in the same direction as the force applied to the object. What force is having to be overcome by the pushing force? Friction!
6. Lifting Force Movement Distance Work is not done every time a force is applied. Work is done only when a force moves an object in the same direction as the applied force. Is the man doing work when he lifts the box? Yes. Is the man doing work when he holds the box? Is the man doing work if he carries the box? No! No! (But he IS applying a force) (But he IS applying a force)
7. Work Think about pushing on wall that does not move. A force is applied but the wall has not moved a distance. Is work done?
8. Work No! But I did expend energy applying a force! Think about pushing on wall that does not move. A force is applied but the wall has not moved a distance. Is work done?
9. Calculating Work Work = force (N) x distance (m) W = F x D The unit for work is a Joule (J). If you lifted an object weighing 1N through a distance of 1m, you did 1 Joule of work: W = FD = 1N x 1m = 1 J Think about how much force a Newton is…about ¼ of a pound. Is a Joule of work…very much work? No!
10. Calculating Work If you lifted an object weighing 200 N through a distance of 0.5m, how much work would you do?
11. Calculating Work If you lifted an object weighing 200 N through a distance of 0.5m, how much work would you do? Work = force x distance = 200 N x 0.5m = 100 J.
12. Power Power is the rate at which work is done , or the amount of work per unit of time. Two men can move a lot of sand using shovels… …but a front-end loader can do it in less time… …because the front-end loader has more POWER.
13. Power Power is the rate at which work is done , or the amount of work per unit of time. Power = work / time or Power = force x distance / time Because work = force x distance
14. Power The unit for power is watt (W). One watt is equal to 1 joule per second (1 J/sec). Large quantities of power are measured in kilowatts (kW). One kilowatt equals _____ watts. 1000
15. Machines : How do machines affect work? A machine is a device that makes work easier. A machine is ANY device that helps you to do something.
16. Machines : How do machines affect work? What are other examples of machines?
20. Machine Efficiency:Input and Output There are always two types of work involved in using a machine. Input work is the work that goes into the machine (like turning a pencil sharpener). Output work is the work that comes out of the machine (like the grinding of the pencil). How hard was that??
21. Machine Efficiency: Input and Output The efficiency of a machine can be calculated: Efficiency = (work output / work input) x 100 This is easy to remember…think about it… If you put 100 Joules of work into a pencil sharpener, but only got 80 Joules of work out, the pencil sharpener is 80% efficient: (80 Joules / 100 Joules) x 100 = 80% efficiency
22. Machine efficiency can never be greater than or equal to 100% because the work output can never be greater than the work input. In other words, there is no machine that has a 100% efficiency! Why not?
23. Machine efficiency can never be greater than or equal to 100% because the work output can never be greater than the work input. In other words, there is no machine that has a 100% efficiency! Why not? Think…it’s a force that opposes motion…
24. Machine efficiency can never be greater than or equal to 100% because the work output can never be greater than the work input. In other words, there is no machine that has a 100% efficiency! Why not? Think…it’s a force that opposes motion… Friction! Friction makes every machine <100% efficient
25. Machine Efficiency The friction in a machine “wastes” energy in the form of heat Machines with the smallest amount of friction are the most efficient.
26. Machine Efficiency The closer the work output is to work input, the more efficient the machine. Toyota hybrid “concept car”
27. Many household appliances have energy guides that tell the consumer how efficient the appliance is. The more efficient the appliance the more money the consumer will save.
28. You can also look for the “energy star” label on more efficient machines.
29. Machines More force Machines make work easier because they change the size or the direction of the force put into the machine.
30. Machines Most machines make work easier by multiplying either force or distance. Which does which?
31. Machines Most machines make work easier by multiplying either force or distance. Force! Distance! Which does which?
33. Machines What is multiplied, force or distance? Distance Force Force when “prying” the dirt free, distance when lifting it up out of the hole or into a truck or wheelbarrow
34. Determining How Helpful a Machine Is Besides the efficiency of a machine we also can determine how helpful a machine is.
35. Determining How Helpful a Machine Is Effort Force Resistance Force What we mean by how helpful is how many times the machine multiples the effort force to overcome the resistance force
37. Determining How Helpful a Machine Is ? Effort Force Resistance Force ? Effort Force or Resistance Force? Effort Force ?
38. Determining How Helpful a Machine Is The number of times a machine multiplies the effort force is called the mechanical advantage. This tells you how much force is gained by using the machine. The more times the machine multiples the effort force, the easier it is to do the job.
39. Quick quiz –think out loud 1. What is a machine? 2. Describe relationship between friction and the efficiency of a machine.
41. Inclined Plane Inclined plane: A ramp is an example of an inclined plane. It is simply a flat slanted surface. It has no moving parts. An inclined plane decreases the size of the effort force needed to move an object.
42. Wedge Wedge: An inclined plane that moves. In a wedge, instead of an object moving along the inclined plane, the inclined plane itself moves to raise the object.
43. Lever Lever : A lever is a rigid bar that is free to pivot , or move about a fixed point. The fixed point is called the fulcrum.
44. Wheel and Axle A wheel and axle is a simple machine made up of two circular objects of different sizes. The wheel is the larger object. It turns around a smaller object called the axle.
45. Wheel and Axle The mechanical advantage depends on the radius of the wheel and of the axle.
46. Screw Screw : A screw is inclined plane wrapped around a central bar or cylinder to form a spiral.
47. Pulley A pulley is a rope, belt, or chain wrapped around a grooved wheel. A pulley can function in two ways. It can change the direction of a force or the amount of force.
48. Compound Machines Simple or compound machines cannot multiply work. You can get no more work out of a machine than you put into it.
