SIMPLE MACHINESSIMPLE MACHINESMAKING WORK EASIER!MAKING WORK EASIER!

LEVER PULLEY

WHEEL AND AXLE

INCLINED PLANE

SCREW

WEDGE

SIMPLE MACHINESSIMPLE MACHINES

• SIMPLE MACHINES SIMPLE MACHINES ARE DEVICES THAT ARE DEVICES THAT HELP US DO WORKHELP US DO WORK

• SIMPLE MACHINES SIMPLE MACHINES DO NOT HAVE DO NOT HAVE ENERGY SOURCES ENERGY SOURCES OF THEIR OWNOF THEIR OWN

• SIMPLE MACHINES SIMPLE MACHINES DO NOT DO ANY DO NOT DO ANY WORK BY WORK BY THEMSELVESTHEMSELVES

• SIMPLE MACHINES SIMPLE MACHINES SIMPLY TRANSFER SIMPLY TRANSFER WORK DONE BY A WORK DONE BY A HUMAN TO HUMAN TO SOMETHING ELSESOMETHING ELSE

ADVANTAGESADVANTAGES OF USING SIMPLE OF USING SIMPLE MACHINES MACHINES • SIMPLE MACHINES CAN SIMPLE MACHINES CAN

CHANGE THE AMOUNT CHANGE THE AMOUNT OF FORCE REQUIRED OF FORCE REQUIRED TO DO WORK.TO DO WORK.

• SIMPLE MACHINES CAN SIMPLE MACHINES CAN CHAGES THE DISTANCE CHAGES THE DISTANCE THROUGH WHICH THE THROUGH WHICH THE FORCE ACTS OR THE FORCE ACTS OR THE DIRECTION IN WHICH IT DIRECTION IN WHICH IT ACTS.ACTS.

• SIMPLE MACHINES SIMPLE MACHINES ALLOW HUMANS TO ALLOW HUMANS TO DO THINGS THAT DO THINGS THAT THEY OTHERWISE THEY OTHERWISE MIGHT NOT BE ABLE MIGHT NOT BE ABLE TO DO.TO DO.

THE WEDGETHE WEDGE• THE THE WEDGEWEDGE IS A IS A

MOVING INCLINED MOVING INCLINED PLANEPLANE

INCLINED PLANE USED AS A WEDGE

INCLINED PLANE AT REST

CHOPING WOOD IS AN EXAMPLE OF USING AN INCLINED PLANE AS A WEDGE

THE SCREWTHE SCREW• THE THE SCREWSCREW IS AN IS AN

INCLINED PLANEINCLINED PLANE WRAPPED AROUND WRAPPED AROUND A SHAFTA SHAFT

SHAFT

SCREWS

WITHOUT AN INCLINED PLANE WRAPPED AROUND A SHAFT, WE WOULD NOT BE ABLE TO EASILY FORCE A SHAFT INTO MATERIALS LIKE WOOD OR METAL.

SCREWS MAKE WORK MUCH EASIER!

THE WHEEL AND AXLETHE WHEEL AND AXLE• THE THE WHEEL AND WHEEL AND

AXLEAXLE IS AN OFTEN IS AN OFTEN MISUNDERSTOOD MISUNDERSTOOD SIMPLE MACHINESIMPLE MACHINE

• IT IS BASICALLY A IT IS BASICALLY A LEVER THAT CAN LEVER THAT CAN MOVE IN A CIRCLEMOVE IN A CIRCLE THE STEERING WHEEL IN A

CAR AND THE SHAFT IT IS ATTACHED TO IS AN EXAMPLE OF A WHEEL AND AXLE

THE WHEEL MUST BE ATTACHED TO THE SHAFT(AXLE) TO TRANSFER FORCE TO IT!

WHEEL AND AXLE

THE LEVERTHE LEVER

• A A LEVERLEVER IS A BAR IS A BAR THAT CAN REST ON THAT CAN REST ON AND TURN AROUND AND TURN AROUND A SUPPORT CALED A A SUPPORT CALED A FULCRUMFULCRUM..

• THE FORCE YOU THE FORCE YOU APPLY TO ONE PART APPLY TO ONE PART OF THE OF THE LEVERLEVER IS IS CALLED THE CALLED THE EFFORTEFFORT

• THE WEIGHT THAT THE WEIGHT THAT IS LIFTED OR THE IS LIFTED OR THE RESISTANCE THAT RESISTANCE THAT IS OVERCOME IS IS OVERCOME IS CALLED THE CALLED THE LOADLOAD..

EFFORT

LOAD FULCRUM

LEVER

THE PULLEYTHE PULLEY• THE THE PULLEYPULLEY IS A IS A

GROOVED WHEEL GROOVED WHEEL WITH A ROPE OR WITH A ROPE OR CABLE AROUND ITCABLE AROUND IT

• PULLEYSPULLEYS HELP US HELP US DO WORK BY DO WORK BY MOVING OBJECTS MOVING OBJECTS UP, DOWN, OR UP, DOWN, OR ACROSS.ACROSS.

GROOVED WHEELS

SINGLE PULLY

PULLEY ON A SHIP

WHEN THE EFFORT IS PULLED IN ONE DIRECTION THE LOAD GOES IN THE OTHER DIRECTION

EFFORT

LOAD

THE INCLINED PLANETHE INCLINED PLANE• THE THE INCLINED INCLINED

PLANEPLANE IS A IS A SLANTING SLANTING SURFACE SURFACE CONNECTING A CONNECTING A LOWER LEVEL TO A LOWER LEVEL TO A HIGHER LEVELHIGHER LEVEL THE SLIDE IS A MODIFIED

INCLINED PLANE

COMMERCIAL RAMP FOR MOVING HEAVY BOXES INTO A TRUCK

THE REMAINING SLIDESTHE REMAINING SLIDES ARE A QUIZ ARE A QUIZ

ENJOY!

SIMPLE MACHINES QUIZSIMPLE MACHINES QUIZ• QUESTION :QUESTION : A STIFF BAR THAT RESTS ON A SUPPORT A STIFF BAR THAT RESTS ON A SUPPORT

CALLED A FULCRUM IS CALLED A(N)CALLED A FULCRUM IS CALLED A(N)

• A: SCREWA: SCREW• B: INCLINED PLANEB: INCLINED PLANE• C: LEVERC: LEVER• D: WEDGED: WEDGE

SIMPLE MACHINES QUIZSIMPLE MACHINES QUIZ• QUESTION: QUESTION: A SLANTING SURFACE CONNECTING A LOWER A SLANTING SURFACE CONNECTING A LOWER

LEVEL TO A HIGHER LEVEL IS CALLED A(N)LEVEL TO A HIGHER LEVEL IS CALLED A(N)

A: INCLINED PLANEA: INCLINED PLANEB: PULLEYB: PULLEYC: SCREWC: SCREWD:WHEEL AND AXELD:WHEEL AND AXEL

SIMPLE MACHINES QUIZSIMPLE MACHINES QUIZ• QUESTION:QUESTION: A WHEEL WITH A ROD THROUGH ITS A WHEEL WITH A ROD THROUGH ITS

CENTER; BOTH PARTS MOVING CENTER; BOTH PARTS MOVING TOGETHER IS CALLED A(N)TOGETHER IS CALLED A(N)

A: LEVERA: LEVERB: WEDGEB: WEDGEC: PULLEYC: PULLEYD: WHEEL AND AXELD: WHEEL AND AXEL

SIMPLE MACHINES QUIZSIMPLE MACHINES QUIZ• QUESTION:QUESTION: AN INCLINED PLANE WRAPPED AROUND AN INCLINED PLANE WRAPPED AROUND

A ROD OR POLE IS CALLED A(N)A ROD OR POLE IS CALLED A(N)A: PULLEYA: PULLEYB: SCREWB: SCREWC: WEDGEC: WEDGED: LEVERD: LEVER

SIMPLE MACHINES QUIZSIMPLE MACHINES QUIZ• QUESTION:QUESTION: A GROOVED WHEEL WITH A ROPE OR A GROOVED WHEEL WITH A ROPE OR

CABLE AROUND IT IS CALLED A(N)CABLE AROUND IT IS CALLED A(N)A: WEDGEA: WEDGEB: INCLINED PLANEB: INCLINED PLANEC: PULLEYC: PULLEYD: WHEEL AND AXELD: WHEEL AND AXEL

SIMPLE MACHINES QUIZSIMPLE MACHINES QUIZ• QUESTION:QUESTION: AN OBJECT WITH AT LEAST ONE AN OBJECT WITH AT LEAST ONE

SLANTING SIDE ENDING IN A SHARP SLANTING SIDE ENDING IN A SHARP EDGE IS CALLED A(N)EDGE IS CALLED A(N)

A: PULLEYA: PULLEYB: SCREWB: SCREWC: WHEEL AND AXELC: WHEEL AND AXELD: WEDGED: WEDGE

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

BIKE HANDLEBAR

LEVERLEVER

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

INCLINED PLANEINCLINED PLANE

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

WHEEL AND AXELWHEEL AND AXEL

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

SCREWSCREW

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

PULLEYPULLEY

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

LEVERLEVER

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

WEDGEWEDGE

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

WHEEL AND AXELWHEEL AND AXEL

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

WEDGEWEDGE

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

THIS PART

SCREWSCREW

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

INCLINED PLANEINCLINED PLANE

SIMPLE MACHINE PICTURE SIMPLE MACHINE PICTURE QUIZQUIZ• WHAT SIMPLE MACHINE IS THIS?WHAT SIMPLE MACHINE IS THIS?

PULLEYPULLEY

THE END OF THE PICTURE THE END OF THE PICTURE QUIZQUIZ

CLICK ON THE VIDEO BELOW TO WATCH A VIDEO ABOUT THE INCLINED PLANE, WEDGE, AND SCREW

CLICK ON THE VIDEO BELOW TO WATCH A VIDEO ABOUT THE LEVER, WHEEL AND AXEL, AND PULLEY.

Can you name the simple Can you name the simple machines in this picture?machines in this picture?

Can you find the simple Can you find the simple machines in this picture?machines in this picture?