Work Notes
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Work is done when a force causes an object to move in the direction of the applied force. The amount of work done depends on both the force applied and the distance over which it is applied, as defined by the equation Work = Force x Distance. Calculating work examples are provided, such as lifting a 50N potted plant 0.5m requiring less work than lifting a 100N potted plant the same distance, or determining that moving a 250N car 5m would require 1,250J of work and lifting a 63N book 3m would require 189J of work.
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The document discusses the scientific definition of work. It states that work occurs only when a force causes an object to move, not when an object is held in place. It provides examples like men pushing a car that is not moving to illustrate this. The document also defines the formula for calculating work (Work = Force x Distance), and provides an example calculation. Finally, it discusses the relationship between work and energy, how machines can reduce the force needed for the same amount of work, and how friction also affects work calculations.P11.-WORK.ppt
P11.-WORK.pptJasonbaloro
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Here are the answers:
1. Work = Force x Distance
= 50N x 10m
= 500 Joules
2. Work = Force x Distance
= Weight x Height
= 45 kg x 9.8 m/s^2 x 1.2m
= 546.4 Joules
3. Total Force = Tom's Force + Jerry's Force = 50N + 70N = 120N
Work = Total Force x Distance
= 120N x 4m
= 480 JoulesWork, energy and power
Work, energy and powerKruNistha Akkho
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Work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force. Work is only done when there is a component of force in the direction of motion. No work is done when the force is perpendicular to the displacement. Work has units of joules (J), which is calculated as newton-meters (Nm). Examples are provided to demonstrate calculating work done by applying different forces over various displacements and angles.Work and Power
Work and PowerHeather Harris
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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.Science Intervention materials on science
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This document is a science intervention material that discusses the concepts of force and work. It uses pictures, examples, and activities to teach students about different types of forces (contact vs. non-contact), what constitutes work, and how to calculate work using various formulas. The material guides students through examples of determining if a situation involves a contact or non-contact force, identifying whether work is being done in images, and solving word problems to calculate work done. It also includes review questions and activities to help students assess their understanding of these core science concepts.WORK and POWER discussion for grade 8 students
WORK and POWER discussion for grade 8 studentsinoynay
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The document explains the concepts of work, power, and energy in physics, detailing how work is done when force causes movement in the direction of the force and the relevant formulas. It defines mechanical energy as the sum of kinetic and potential energy and discusses the factors influencing each type of energy. Additionally, the document presents examples and calculations related to work done and power exerted, aiming to help students understand these fundamental physics principles.Work.pptx
Work.pptxPrincessRegunton
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1) Work is done when a constant force causes an object to move in the direction of the applied force. Work equals force multiplied by displacement.
2) For work to be considered done, the force must cause motion in the direction of the force. Lifting objects vertically or pushing objects horizontally are examples of work.
3) Power is the rate at which work is done and is measured in watts (joules per second). Greater work rates mean greater power output, while smaller work rates mean smaller power.Science intervention material SCIENCE PHOTOSYNTHESIS
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This document is a science intervention material that provides instruction on the concepts of force and work. It uses examples, activities, and problems to teach students about different types of forces (contact vs. non-contact), what qualifies as work being done, and how to calculate work using various formulas. The material guides students through worked examples and encourages them to identify forces and calculate work in different situations. It also includes a game to help students learn related vocabulary words. The overall document aims to build students' understanding of key physics concepts through interactive lessons and practice problems.Science intervention material
Science intervention materialPau Loo
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This document presents a science intervention material on the topic of work and forces for 4th year science students. It begins with an introduction to the concept of force, explaining contact and non-contact forces. Students are then guided through examples and problems to determine if work is done or not in different situations. The document provides formulas for calculating work, such as force x distance and mass x gravity x height. Sample problems are worked through applying these formulas. Vocabulary terms like force, distance, contact and displacement are reviewed. The material concludes by having students solve additional practice problems on calculating work.Ad
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- 1. Simple Machines and Work
- 2. Work Work is done on an object when the object moves in the same direction in which the force is exerted. If no motion occurs then there will be no work. Did you do work with your book bag on your back walking to class?
- 3. Calculating Work Work depends on two things: 1. Force 2. Distance Which would require more work: 1. Lifting a 50N potted plant .5 m off the ground to a table or a 100N potted plant the same distance.
- 4. Calculating Work We can find the work it takes to move objects with the following equation. W= Force (F) x Distance (d) The following unit is used for work: Joule (J) Now, find how much work it would take to move each of the plotted plants.
- 5. Calculating Work How much work would it take to move a 250 N car a distance of 5m? How much work would it take to lift a 63 N book a distance of 3m?
- 6. Calculating Work How much work would it take to move a 250 N car a distance of 5m? How much work would it take to lift a 63 N book a distance of 3m?