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Chapter 15 Work
How did humans thousands of years ago build such structures as the great pyramids of Egypt?
Work the force that is applied to move an object the direction the object moves must be in the same direction as the force applied if the object doesn’t move, then no work has been done
Examples Pushing against a wall -– no work has occurred because the object doesn’t move Lifting a bag of groceries –- work is done Carrying a bag of groceries – no work is being done
Examples Pushing a car Lifting a baby Carrying a baby Throwing a baseball Pushing against the floor Hammering a nail
How to Calculate Work Work = Force * Distance Units are defined as a joule (J) or a Newton*meter
Problem You lift a box that weighs 200 Newtons a distance of 0.5 meters. How much work is done?
Procedure Write the equation Figure out what is being asked – what are you solving for? Determine what information is given Plug & Chug – don’t forget the units!
Step One Write the equation Work = Force * Distance
Step Two Figure out what is being asked – what are you solving for? How much WORK is done?
Step Three Determine what information is given Box weighs (force) 200N Distance box moves = 0.5m
Step Four Plug & Chug – don’t forget the units! Work = (200N)(0.5m) = 100 N*m or = 100 J (joules)
You Try One! A 900N mountain climber scales a 100m cliff. How much work is done by the mountain climber?
Calculating Work. Work = force x distance W=f x d Unit of Measurement for Work is Joules Unit of Measurement for Force is Newtons Unit of Measurement.
Work Work is done only when a force moves an object. When you push, lift, or throw an object, you are doing work. A force acting through a distance is.
Work Two conditions must be met in order for work to be done. - an object must move - a force must be applied to the object in the direction that the.
Work. Lifting books out of your backpack? Carrying your backpack to class? Pushing a car that is stuck in the snow? Rolling a bowling ball? What.
Understanding and Calculating Work Work - When a force acts on an object and causes it to move through a distance, energy is transferred and work is done.
Forces & Motion Work. Work – force exerted on an object that causes it to move some distance Work = Force x Distance Force is still measured in Newtons.
Work. What is work? In science, the word work has a different meaning than you may be familiar with. The scientific definition of work is: using a force.
In this section you will use the equation to calculate work done use the equation to calculate kinetic energy solve simple energy interchange problems.
Chapter 8 Work. Terms to Learn Work - the action that results when a force causes an object to move in the direction of the force being applied and only.
Section 14 Work, Power, and Energy. More Power!!!!! What does he mean?
Work, Power, and Simple Machines. What is Work? The scientific meaning of work is a force acting through a distance. Force must be in the same direction.
Work When a force causes an object to MOVE in the DIRECTION of the force. Calculated using the equation: Force x Distance F x d Units Newton.
A force of 15 newtons is used to push a box along the floor a distance of 3 meters. How much work was done in this situation?
Chapter 15 Power. just like the word “work”, power has a different meaning in the science world power tells you how fast work is being done.
Work, Power & Simple Machines. What is “WORK?” Work is defined as A force acting through a distance In order for “work” to be done There must be a.
1. Title: Power of a Motor Power of a Motor 2. Date: Today’s Date 3. Names: Team members and cooperative jobs. Team members and cooperative jobs.
Book M: Section 4.1. In science you do work on an object when you exert a force on the object that causes the object to move some distance. If you push.
What is Work? In Science, Work is accomplished when a force is moved over a distance. Work. –Lifting books, pushing a box 2 feet, pulling a wagon. Not.
Chapter 5 Lesson 1. What is work? To many people, the word work means something they do to earn money. The word work also means exerting a force with.
1. Read each slide carefully. Record notes on notebook paper. Give your notes a title: “Work Notes” Write the title of each page in which you.
1 Work in Science. 2 What is work? In science, the word work has a different meaning than you may be familiar with. The scientific definition of work.
Work and Machines What is Work?. The Meaning of Work you exert a force on the object that causes the object to move some distance In science, you do work.
Work. Work …is a force acting through a distance. Work is only done, when a force moves an object And the object must be moved in the direction of the.
Bell Ringer Write down this question on your paper and answer Hitting a ball with a tennis racket is work because ____________.
Work F The force, F, pushes the box for a short distance. This causes the box to start moving!!!!!! It gains energy!!!! I just don’t have any energy
What is Work? - Examples… Lifting weights, pulling a wagon, pushing a box across the floor and pushing a grocery cart -What cause it? A force applied.
14.1 Work and Power The weight lifter applies a large force to hold the barbell over his head. Because the barbell is motionless, no work is done on the.
Core Relate (without calculation) power to work done and time taken, using appropriate examples Supplement Recall and use the equation P = E/t in simple.
Work is the product of the force and the distance through which the object moves W = F x d W = F x d.
Work Work occurs when: 1.An object moves when a force is applied 2.The direction of the objects motion is the same as the direction of the force Formula:
Chapter 5 Lesson 1. Interactive Notebook Title: Work Work= transfer of energy that occurs when a force makes an object move For work to be done, something.
Work. What do you think of when you think of work? You probably think of…
1 Work in Science. 2 What is work? In science, the word work has a different meaning than you may be familiar with. In science, the word work has a different.
What is Work?. Work Demo One student pushes against the wall. One student pulls up a set of keys Who does more work? Why? Who was applying more force?
Every day we do work. Many days we also don’t do work. Work is defined as a the product of force and the distance the object moves. Work = Force ×
Work and Power. What is force? A force is a push or a pull.
Work and Power 1. Describe the conditions that must exist for a force to do work on an object. 2. Calculate the work done on an object. 3. Describe and.
Drills on WORK. An ice skater glides for two meters across ice.
W ORK AND P OWER. W ARM U P 1. Which of the liquids in the graduated cylinder below is the least dense? 2. Which is the most dense? 3. Estimate the density.
1 Work and Intro to Energy. OPENER: ( 5 min) 1. Turn to the next available page in your journal 2. Write the date: 3. Write the word ENERGY in LARGE letters.
Energy, Work and Simple Machines Chapter 10 Physics.
1 Work and Simple Machines. 2 What is work? In science, the word work has a different meaning than you may be familiar with. The scientific definition.
Lesson 8. Work Work – when a force acts on an object and it moves some distance. WORK = Force (N) x Distance (m) L 8.
Work and Power Chapter 5!! The End of the ROAD is near…..!!
1. What is work? In science, the word work has a different meaning than you may be familiar with. The scientific definition of work is: using a force.
WHAT IS WORK?. Work when you exert a force on an object that causes the object to move some distance Work is done when the object moves in the same direction.
Writing prompt: 10/24/06 If you sit in my rolley chair and push off the wall with your feet, which way will you move? Explain why this happens.
1 Work and Simple Machines. Work Answer the following questions with your elbow partner. What is work? Does everyone do work? We are going to contrast.
The Meaning of Work And Types of Energy. Types of Energy Kinetic Kinetic energy is energy in the form of motion A moving hockey puck has kinetic energy.
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