We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byBradyn Kington
Modified over 2 years ago
Machines Mr. Skirbst Physical Science Topic 06
What is a machine?
- an instrument that makes work easier
What is a machine? -an instrument that makes work easier WORK INPUTMACHINE OUTPUT
What is efficiency?
-A comparison of work output to work input
What is efficiency? -A comparison of work output to work input E = ( W o ) / ( W i )
What is efficiency? -A comparison of work output to work input E = ( W o ) / ( W i ) E NEVER reaches 100% Some E always lost (friction)
What is a mechanical advantage?
- How much a machine multiplies the effort force
What is a mechanical advantage? -How much a machine multiplies the effort force M.A. = ( F r ) / ( F e ) F r – resistant force F e – effort force
What is a mechanical advantage? The higher the MA, the easier it is to do work
What is a mechanical advantage? Illustrations: Lever:Pulley:
What is a simple machine?
A basic instrument that can increase the mechanical advantage
What is a simple machine? 1.Inclined Plane - a flat, slanted surface - ex. Ramp, door lock
What is a simple machine? 2.Wedge - inclined plane that moves - ex. knife, ax, key
What is a simple machine? 3.Screw - inclined plane around a cylinder - ex. screw, bolt, jar lid
What is a simple machine? 4.Lever - rigid bar free to pivot around a fulcrum - ex. crowbar, paddle, pliers
What is a simple machine? 5.Wheel and Axle - circular object turning around an axle (larger cylinder around smaller cylinder) - ex. Wheel, windmill, door knob
What is a simple machine? 6.Pulley - rope or chain around a grooved wheel and axle - ex. window shade, flag pole, block and tackle
Machines Mr. Skirbst Physical Science. What is a machine?
Simple Machines Machines do not save work. Machines make work easier. Machines make work easier because it changes either the size or the direction.
Machine notes CP Physics Ms. Morrison.
Bell Work: Simple machines 1. Simple machines make work ( easier / harder ). Match the tool to the type: Type of machineTool 2. Incline planeDoor knob.
SIMPLE MACHINES Chapter 5 Notes. Machine A device that helps make work easier Changes the size or direction of the force Simple Machine – A type of machine.
Machine- a device that makes work easier by changing the direction or size of the force.
How Tools Work. The Six Simple Machines Lever Inclined Plane Wedge Screw Pulley Wheel and Axle.
Work, Power, & Machines What is work ? The product of the force applied to an object and the distance through which that force is applied.
Topic: Simple Machines PSSA: C / S8.C.3.1. Objective: TLW compare different types of simple machines. TLW compare different types of simple machines.
Simple Machines All machines are made from the six simple machines: lever, inclined plane, wedge, screw, wheel and axle, and pulley.
A machine helps you do work by changing the amount or direction of the force you need to apply. There are six basic types of simple machines.
SIMPLE MACHINES NOTES. Simple Machines A simple machine is a device that helps reduce the amount of force required to do work. Work is done when a force.
SIMPLE MACHINES NOTES, PART 2 Physical Science (8A) Coach Dave Edinger.
PHYSICAL SCIENCE SIMPLE MACHINES Abney Elementary.
Simple Machines There are 6 types of simple machines: the inclined plane, the wedge, the screw, the lever, the pulley, and the wheel and axle.
What is work? Work = when you exert a force on an object and that object moves some distance The force must be in the same direction as the object’s motion.
Work and Machines Simple Machines. Work and Machines Machines make work easier to do –They change the size of a force needed, the direction of a force,
WORK POWER SIMPLE MACHINES. I. WORK 1. What is work? A force acting through a distance No work is done on the object unless the object moves and the.
Work, Power, & Machines What is work ? The The product of the force applied to an object and the distance through which that force is applied.
Machines Help people do work DOES NOT DECREASE the AMOUNT of work done—makes work easier! CHANGES the way work is done: Size of force Distance over.
5.3 Simple Machines. 6 Types Lever Pulley Wheel and axle Inclined Plane Screw Wedge.
Chapter 12 Flash Cards 20 index cards. Work When force is exerted on an object causing it to move in the same direction Work = F x D Joule (J) = Nm.
Inclined Plane Decreases Input force!!! A flat, sloped surface.
Mrs. Wharton’s Science Class
5.3 Simple Machines.
Simple Machines. Nature of Machines Machines are any device that transfer a force from one place to another. – Nutcracker, ramp, engine All complicated.
The six hardest working machines in your world
Review of Chapter 4 Book “M”. Section 1 What is work? Work is done on an object when the object moves in the same direction in which the force is exerted.
Work and Machines. Work is being done when you exert a force that moves an object in the direction of the force.
Chapter 7 Review. Why we use machines A machine is a device that makes work easier. A simple machine is a device that does work with only one movement.
Levers. First Class Lever Fulcrum is between input force and the load Always change the direction of the input force.
WHAT IS A MACHINE? Machine: A device that makes work easier by changing the size or direction of a force When you think of a machine, you may think of.
Machines, Machines, Machines. When a force moves an object in the direction you are pushing or pulling that object Work.
Physical Chapter Seven Simple Machines Levers Pulleys Inclined Planes Screws Wheel & Axle Wedge Compound Machines.
Simple Machines Outline Notes
Work The product of the force and distance when a force is used to move an object.
Chapter 8 Work and Machines Work Simple Machines Power Simple Machines
Physical Science Chapter 12. devices that change the direction of a force or the size of a force that help us to do work machines will multiply your.
Work and Machines Chapter 5 Sec 2. What is a Machine? Any device that makes work easier.
Chapter 15 Machines What is a simple machine? People use machines to make work easier They allow a person to -change the size of the force -change.
WEEK27 PHYSICAL SCIENCE VOCABULARY. 1) FRICTION A force that opposes the motion of an object.
Physics: Machines Mr. Fox’s 8 th Grade Science (I’ve got nothing witty for here.)
Types of Machines Levers Simple machine that has a bar that pivots at a fixed point This fixed point is called the fulcrum The load Input force 3 Types.
Chapter 8 Sect. 2 & 3 Simple and Compound Machines Mechanical Advantage and Mechanical Efficiency 1.
Simple Machines There are six kinds of simple machines: 1. Inclined Plane – 2. Pulley- 3. Lever – 4. Wheel and Axle- 5. Screw – 6. Wedge - ramp top of.
Chapter 14 Section 3.
Machines. Work and Power Power is the rate at which work is done Power = Work time Remember that W = Fd So, Power = Fd t Power is measured in Watts –1.
Machines and Mechanical Advantage Archimedes (Greek mathematician, 287 to 212 B.C.) said, “Give me a place to stand and I will move the Earth,” meaning.
© 2017 SlidePlayer.com Inc. All rights reserved.