PULLEYSPULLEYSBYBY

MAGENTA ROSEMAGENTA ROSEEALAM!EALAM!

ENJOY MY POWER ENJOY MY POWER POINT!POINT!

FACTS ABOUT PULLEYS?FACTS ABOUT PULLEYS?

Pulleys are a Simple Machine used to Pulleys are a Simple Machine used to help pull heavy things up & down.help pull heavy things up & down.

You can find Pulleys in....You can find Pulleys in....Bikes.Bikes.Escalators.Escalators.Elevators.Elevators.Lifts.Lifts.There might be some other things as There might be some other things as

well.well.

What is a Pulley?What is a Pulley?

A Pulley is something like a Wheel & A Pulley is something like a Wheel & Axle, but instead you can pull things Axle, but instead you can pull things up & down.up & down.

HOW DO PULLEYS HELP HOW DO PULLEYS HELP PEOPLE?PEOPLE?

Pulleys help People in many different Pulleys help People in many different ways!ways!

Like say if you were working on a crane Like say if you were working on a crane you would be using a crane to Lift you would be using a crane to Lift something Up or to Bring something something Up or to Bring something Down!Down!

AND if you were on an Elevator OR a Lift AND if you were on an Elevator OR a Lift you would go Up & Down Up & Down a lot!you would go Up & Down Up & Down a lot!

PULLEYS ARE HARD WORK IF YOU HAVE PULLEYS ARE HARD WORK IF YOU HAVE TO PULL OR BRING THEM UP AND DOWN!TO PULL OR BRING THEM UP AND DOWN!

What is force?What is force?

Force is anything that changes the Force is anything that changes the speed, direction or motion of an speed, direction or motion of an object.object.

Parts of a pulley?Parts of a pulley?

A pulley has a Wheel with a Groove. A pulley has a Wheel with a Groove. The Groove holds a peace of Rope or The Groove holds a peace of Rope or

Chain that goes through a Pulley.Chain that goes through a Pulley. A Person pulls the Force down so A Person pulls the Force down so

that the Load goes up.that the Load goes up. When a Person brings the force up When a Person brings the force up

the Load goes down again.the Load goes down again.

Single Fixed Pulleys?Single Fixed Pulleys?

A Single Fixed Pulley is a Pulley A Single Fixed Pulley is a Pulley attached to an object.attached to an object.

This type of Pulley changes the This type of Pulley changes the direction a Load moves.direction a Load moves.

A Flag pole has a Single fixed Pulley.A Flag pole has a Single fixed Pulley.

Pulling down on the Rope raises the Pulling down on the Rope raises the Flag. Flag.

Moving the Rope in the opposite Moving the Rope in the opposite lowers the Flag.lowers the Flag.

Moveable Pulleys?Moveable Pulleys?

A Moveable Pulley is a Pulley that is A Moveable Pulley is a Pulley that is attached to the load instead of attached to the load instead of another object.another object.

Moveable Pulleys make lifting things Moveable Pulleys make lifting things easier.easier.

Moveable Pulleys often are used with Moveable Pulleys often are used with Fixed Pulleys.Fixed Pulleys.

Cranes use Fixed and Moveable Cranes use Fixed and Moveable Pulleys to lift heavy Loads.Pulleys to lift heavy Loads.

Double Pulleys?Double Pulleys?A Double Pulley has two Pulleys. A Double Pulley has two Pulleys. The Rope is attached to a Fixed The Rope is attached to a Fixed

Pulley.Pulley.The Rope winds around a Moveable The Rope winds around a Moveable

Pulley & back over the Fixed Pulley.Pulley & back over the Fixed Pulley.Lifting a Load with a Double Pulley is Lifting a Load with a Double Pulley is

twice as easy, But the Load travels twice as easy, But the Load travels only half as far. only half as far.

Counterweights?Counterweights?

Counterweights keep the Machines Counterweights keep the Machines from falling over.from falling over.

Counterweights are weights that Counterweights are weights that Balances a Load.Balances a Load.

What things are Pulleys in?What things are Pulleys in?

Escalators.Escalators.Block & Tackle.Block & Tackle.Cranes.Cranes.Flag Poles.Flag Poles.Elevators.Elevators.

DIOGRAM OF A PULLEY?DIOGRAM OF A PULLEY?

Where to find PulleysWhere to find Pulleys

You will know when you have found a You will know when you have found a Pulley when you are on a Lift , Escalator, Pulley when you are on a Lift , Escalator,

Elevator and or Crane.Elevator and or Crane.Do you get my point of view.Do you get my point of view.

I hope you do .I hope you do .

THANK YOUTHANK YOUCredits Credits For class m3For class m3

I hope you all enjoyedI hope you all enjoyed Watching,Watching, Waiting, Listing &Waiting, Listing & Starring atStarring at mymy power point.power point.CREATED BY…. MAGENTA

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