SIMPLE

MACHIN

E

S

WORKUsing force to move an

object

FORCE

Push or pull

FORCESGRAVITY

Force that pulls two

objects together

Gravity pulls us

toward the ground

FRICTION

Force that

holds back the

movement

of an object

WHEEL A

ND

AXLE

connec

ted so

they

turn

toget

her

GEARS

Toothed wheels

LEVERA B A R T H AT P I V O T S O N A F I X E D P O I N T

FULCRUM

the point that a lever pivots on

INCLIN

ED

PLANE

flat,

slop

ing s

urfac

e

WEDGE2 inclined planes placed back to back. Used to force two things apart or split one thing into two.

PULLEY

M A K E S W O R K E A S I E R BY C H A N G I N G T H E D I R E C T I O N O F F O R C E

A W H E E L W I T H A R O P E , C O R D , O R C H A I N A R O U N D I T

SIM

PLE

MA

CH

INES• few or no moving

parts

• used by applying force

• make work easier by changing the amount of force needed to do the work