A lever is a simple machine that contains a bar that can turn around a fixed point called a fulcrum. Levers change the direction, distance, or size of the applied force and make work easier. There are three classes of levers based on the position of the fulcrum, effort force, and resistance force. A first-class lever has the fulcrum between the effort and resistance, like a screwdriver. A second-class lever has the resistance between the effort and fulcrum, like a wheelbarrow. A third-class lever has the effort between the fulcrum and resistance, like a broom.
Simple machines by Saliha Rais, for grade 5.Saliha Rais
The slide show include topics: simple machines, force magnifiers, movement magnifiers, levers and its types. At the end there is a short review/test, so you can assess what you have learned.
I made this for grade 5 students.
Simple machines by Saliha Rais, for grade 5.Saliha Rais
The slide show include topics: simple machines, force magnifiers, movement magnifiers, levers and its types. At the end there is a short review/test, so you can assess what you have learned.
I made this for grade 5 students.
Lever, simple machine consisting of a rigid bar that rotates about a fixed point, called a fulcrum. Levers affect the effort, or force, needed to do a certain amount of work, and are used to lift heavy objects. To move an object with a lever, force is applied to one end of the lever, and the object to be moved (referred to as the resistance or load) is usually located at the other end of the lever, with the fulcrum somewhere between the two. By varying the distances between the force and the fulcrum and between the load and the fulcrum, the amount of effort needed to move the load can be decreased, making the job easier.
Physicists classify the lever as one of the four simple machines used to do work. (The other three are the pulley, the wheel and axle, and the inclined plane.) Work is defined in physics as the result of a force, such as a person lifting, that moves an object over a distance. A common example of a lever is the seesaw. The human arm is also a lever, where the elbow is the fulcrum and the muscles apply the force.
Lever, simple machine consisting of a rigid bar that rotates about a fixed point, called a fulcrum. Levers affect the effort, or force, needed to do a certain amount of work, and are used to lift heavy objects. To move an object with a lever, force is applied to one end of the lever, and the object to be moved (referred to as the resistance or load) is usually located at the other end of the lever, with the fulcrum somewhere between the two. By varying the distances between the force and the fulcrum and between the load and the fulcrum, the amount of effort needed to move the load can be decreased, making the job easier.
Physicists classify the lever as one of the four simple machines used to do work. (The other three are the pulley, the wheel and axle, and the inclined plane.) Work is defined in physics as the result of a force, such as a person lifting, that moves an object over a distance. A common example of a lever is the seesaw. The human arm is also a lever, where the elbow is the fulcrum and the muscles apply the force.
This PPT is created by Areebah and Nimat. We have created this PPT for our Taking Action of Unit-4. We wanted to inform you about how simple machines make our life easier and how they are used in our everyday lives.
How to Create Map Views in the Odoo 17 ERPCeline George
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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.
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Model Attribute Check Company Auto PropertyCeline George
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The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
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.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
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.
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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.
2. LESSON 4: USING LEVERS
A screwdriver, used to pry the lid from a can, is an
example of a simple machine.
A simple machine is a tool with few parts that
makes it easier or possible to do work.
Simple machines change the
direction, distance, or size of the force you
apply.
3. THE LEVER
A lever is a simple machine containing a bar
that can turn around a fixed point.
The fixed point of a lever is called a fulcrum.
Levers can have many shapes.
4. In the figure, a person is using a lever to move a
boulder; as the person pushes down, the boulder
moves up.
The force the person applies to the machine is called
effort force.
The object to be lifted, the boulder, is called the
resistance.
The force the machine uses to move the resistance is
called the resistance force.
The force the machine exerts is greater than the
force the person exerts, SO using a machine makes
5. THE THREE CLASSES OF
LEVERS
Levers can be grouped into three classes.
The classes of levers are based on the position
of the resistance force, the fulcrum, and the
effort force.
In a first-class lever, the fulcrum is positioned
between the effort and the resistance.
Using a screwdriver to open a paint can is an
example of a first-class lever.
6. In a second-class lever, the resistance is
positioned between the effort and the fulcrum.
Wheelbarrows, paper cutters, and most
nutcrackers are examples of second-class levers.
7. In a third-class lever, the effort is positioned
between the fulcrum and the resistance.
A broom is an example of a third-class lever.
