The Students of Room 23 Proudly Present...

Mrs. Wagoner’s Science Class

A Lesson On Simple Machines

1st class leverDEFINITION

A FIRST CLASS LEVER IS A SIMPLE MACHINE THAT HELPS YOU MOVE THINGS FROM ONE

PLACE TO ANOTHER.THERE ARE FOUR IMPORTANT

PARTS TO A LEVER, A FULCRUM, A BOARD, A LOAD, AND THE EFFORT/FORCE.THE

FULCRUM IS THE OBJECT THAT MAKES THE LEVER WORK.

WHEN YOU PUSH ONE SIDE AND THE LOAD IS ON THE

OTHER END, THE LOAD GOES UP.

JORDAN & SARAH

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2nd class lever

the fULcrum and the effort are on each side of the load. this lever helps you carry heavy

loads to different places. you don’t think about it but 2nd class levers are all around you. a lever is a stiff

bar that balances on a fulcrum. A fulcrum is

the place were the lever leans on a resting point. JACK, GRIFFIN, STEPHEN

DIAGRAM

PICTURES

3rd class lever

DEFINITIONA THIRD CLASS LEVER NEEDS

A FULCRUM, LOAD, AND EFFORT. THE EFFORT IS IN THE MIDDLE, THE LOAD IS ON THE

OPPOSITE SIDE OF THE FULCRUM. LEVERS HELP

PEOPLE LIFT LOADS WITH LESS FORCE. WHAT COULD DO

WITHOUT LEVERS?

Diagram

SEBASTIAN CALVIN BEN

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wedge

A WEDGE IS A SIMPLE MACHINE THAT IS USED

TO SPLIT VARIOUS OBJECTS LIKE WOOD, WATER, AND AIR. A WEDGE HAS A WIDE END AND A NARROW

END, ALSO IT HAS TWO SIDES THAT INTERSECT TO MAKE A “V”. THE WEDGE IS USED BY

PUTTING EFFORT ON THE WIDE END AND THE NARROW END

SPLITS THE OBJECT. THE WEDGE IS USED A LOT AND IT HELPS US

LIVE OUR LIVES!

DiagramREAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTURE

WRITTEN BY JARON AND BRENDAN

inclined plane

DEFINITION

AN INCLINED PLANE IS A SLANTING SURFACE THAT IS USED TO MOVE OBJECTS TO

DIFFERENT LEVELS. EX. SLIDE

IT WILL BE EASIER IF YOU CAN PUSH A LOAD UP AN INCLINED PLANE INSTEAD OF LIFTING IT.

MORE INCLINE+SHORTER DISTANCE=MORE

WORK.LESS INCLINE+LONGER DISTANCE=LESS WORK.

Diagram

BY KALEIGH, DANA, & GRACE

screw

AN INCLINED PLANE, WHICH IS ANOTHER SIMPLE MACHINE, IS RAPPED AROUND A SCREW. A SCREW INCLUDES A HEAD, A

SLOT AT THE TOP, AND A POINTED TIP AT THE BOTTOM.

A SCREW JOINS TWO OR MORE

OBJECTS TOGETHER. LARGE SCREWS HOLD PIECES OF FURNITURE TOGETHER. SMALLER SCREWS HOLD

PARTS OF TOYS TOGETHER. FINALLY, THE SMALLEST OF

ALL SCREWS HOLD TOGETHER EYE GLASS FRAMES.

Diagram

REAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTUREBY: NICOLE W, CORINNE L, AND JEN F.

Wheel and Axle

A WHEEL HAS A SMALL OPENING IN THE MIDDLE THAT THE AXLE SLIDES INTO. THE AXLE IS A ROD IN THE CENTER OF A WHEEL.THERE ARE TWO DIFFERENT WAYS THAT A WHEEL AND AXLE WORK TOGETHER. ONE WAY THE WHEEL AND AXLE WORK WHEN THE AXLE MOVES, THE WHEEL GOES WITH IT AND KEEPS IT ON TRACK. OR THE AXLE IS HELD IN ONE PLACE AND THE WHEEL SPINS AROUND IT!

Diagram

REAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTUREBY: JACOB AND MAX!

Pulley

DEFINITION

A PULLEY IS A WHEEL THAT HAS A ROPE LOOPED AROUND

IT. THE ROPE FITS INTO A GROOVE THAT RUNS AROUND

THE EDGE OF A WHEEL. THE GROOVE HELPS THE

ROPE STAY IN PLACE.YOU HAVE TO PULL THE END OF THE ROPE IN ORDER TO

MOVE THE LOAD.

Diagram

REAL LIFE EXAMPLEPICTURE

REAL LIFE EXAMPLEPICTURESIENA AND KATHERINE

We hope that you have enjoyed our presentation and have learned

a lot about simple machines!

Do you think you will be able to find all of the

simple machines in our inventions???

Please join us in the cafeteria for

our Invention Convention.

Thank you for coming!!!