Bell Work: Simple machines 1. Simple machines make work ( easier / harder ). Match the tool to the type: Type of machineTool 2. Incline planeDoor knob.

Slides:

Advertisements

Similar presentations

Simple Machines.

Advertisements

Machines Mr. Skirbst Physical Science Topic 06. What is a machine?

MACHINES Devices that make work easier by changing the size and/or the direction of the force. They will not do work for you.

5.3 Simple Machines.

Bell ringer If the input force is bigger than the output force, then the input distance is __________ than the output distance. If the output force is.

Work, Power, & Machines What is work ? The product of the force applied to an object and the distance through which that force is applied.

CHAPTER 8 MACHINES.

Unit 5 - Machines MACHINES – UNIT 5.

Simple Machines Outline Notes

Mechanical Advantage, Efficiency, and Types of Simple Machines.

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.

Simple Machines SOL 3.2 By Ms. Weinberg.

Simple Machines.

Lesson 2: Simple Machines

How Tools Work. The Six Simple Machines  Lever  Inclined Plane  Wedge  Screw  Pulley  Wheel and Axle.

Mrs. Wharton’s Science Class

Chapter 14 Section 3.

Work and Machines Chapter 5 Sec 2. What is a Machine?  Any device that makes work easier.

Simple Machines. Machine Machine- A tool used to make work easier.

The six hardest working machines in your world

Work, Power, Simple machines

5.3 Simple Machines. 6 Types  Lever Pulley Wheel and axle  Inclined Plane Screw Wedge.

12.3 Simple Machines.

PHYSICAL SCIENCE SIMPLE MACHINES Abney Elementary.

Simple Machines and Work. What is a Simple Machine?  A simple machine has few or no moving parts.  Simple machines make “work” easier.

Simple machines 6 types of simple machines, mechanical advantage of each type and compound machines.

Chapter 8: Work, Power, Simple machines

By Carly Carlson. Simple And Complex Machines  Simple machine- A machine that changes the amount of force put in to motion, normally making a job easier.

Simple Machines Chap Simple machines 2 families Levers and Incline Plane 2 families Levers and Incline Plane 1- Lever (3 classes) 1- Lever (3.

Simple Machines.

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.

Simple Machines 1 Effort Efficiency Mechanical Advantage WORK Force.

Machines Making Work Easier.

Simple Machines SOL 3.2 By Ms. Weinberg.

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.

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.

Machine- a device that makes work easier by changing the direction or size of the force.

Simple Machines. Types of Simple Machines How do machines make work easier? Machines make work easier by: multiplying the size of the force you exert.

Simple Machines By Anna Maslowski and Sylwia Jablonska.

Chapter 11 Section 4 Simple Machines. What is a Simple Machine?  Is a machine that takes one force and changes its direction, distance, or strength.

Simple Machines Jeopardy! Category1Category2Category3Category Category

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.

Work and Machines. Work is being done when you exert a force that moves an object in the direction of the force.

Machines Mechanical Advantage, Efficiency, and Types of Simple Machines.

Bell Work: Work Intro. Work and Power Work  Work is a force causing something to move a distance.  Work = force x distance  W=f x d  Units for work:

Physical Chapter Seven Simple Machines Levers Pulleys Inclined Planes Screws Wheel & Axle Wedge Compound Machines.

Simple Machines W O R K M e c h a n i c a l A d v a n t a g e Force Effort E f f i c i e n c y 1.

Simple Machines SOL 3.2. Simple machines are tools used to make work easier.

Topic: Simple Machines PSSA: C / S8.C.3.1. Objective: TLW compare different types of simple machines. TLW compare different types of simple machines.

Chapter 8 Sect. 2 & 3 Simple and Compound Machines Mechanical Advantage and Mechanical Efficiency 1.

 Q: What is the purpose of a machine?  A: To make work easier.

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.

Simple Machines Machines do not save work. Machines make work easier. Machines make work easier because it changes either the size or the direction.

Machines Mr. Skirbst Physical Science. What is a machine?

Simple Machines Mechanical Advantage WORK 1 Efficiency Effort Force

Simple Machines.

Work and Machines Types of Machines.

Lever A rigid bar that is free to pivot on a fixed point.

* Do work with one movement

Agenda 5/4/12 Assignment Date DL Simple Machines (#38)

Chapter 4: Work and Machines

Simple Machines.

Work and Machines.

Work and Simple Machines

Simple Machines.

The Six Simple Machines

Presentation transcript:

Bell Work: Simple machines 1. Simple machines make work ( easier / harder ). Match the tool to the type: Type of machineTool 2. Incline planeDoor knob 3. Wheel and axelFlag pole 4. LeverRamp 5. PulleyCrow bar

Machines

 A machine is a device that makes work easier.  Examples: hammer, bicycle ramp, scissors, shovel, and doorknob

Machines  Machines can do a variety of jobs: pump water from a well, hoist a sail, plow a field, catch a fish.  Machines make work easier by changing the size or direction of the applied force.

Two forces involved in using a machine 1. The force applied to a machine is the effort force (F in )  Example: when you pull down on the handle of a crowbar, you are applying an effort force.

Two forces… 2. The force applied by the machine is the resistance force (F out )  Example: Motor turns fan

Work Input 

Output 

What do machines do??  Machines make work easier, but do not multiply work.  So, work output can never be greater than work input

Mechanical Advantage 

Ideal Mechanical Advantage 

Efficiency 

Types of Simple Machines I. Inclined Plane – a slanted surface used to raise an object. Example: a ramp  Wedges and Screws – wedge is an inclined plane that moves. Have an edge that is thinner at one end. Examples: knife, ax, wedge  A screw is also an inclined plane. It is an inclined plane wrapped around a cylinder to form a spiral.

Simple Machines II. Levers – a bar that is free to pivot a fixed point when an effort force is applied. The fixed point of the pivot is called the fulcrum.

Levers ****Three classes of levers: 1. Fulcrum is between the effort force and the resistance force. Example: crowbar, pliers, scissors and seesaws  Resistance force is between fulcrum and effort force. Examples: wheelbarrows, doors  Effort force is greater than the resistance force and the fulcrum

Simple machines III. Pulleys – a chain, belt, or rope wrapped around a wheel. A pulley can change either the direction or the amount of an effort force. IV. Wheel and Axle – a lever that rotates in a circle. Made of 2 wheels of different sizes. Examples: bicycles, Ferris wheels, water wheels and gears.