MACHINESMACHINES

BY BRENDA AND ELENABY BRENDA AND ELENA

WE NEED MACHINESWE NEED MACHINES• A machine is something we use to make

work easier.We can classify machines as simple machines or complex machines.Simple machines have a few movig parts.Complex machines are made up of different simple machines.All machines use energy,but many complex machines need electrical energy to work

SIMPLE MACHINESSIMPLE MACHINES

PULLEYPULLEY

• A pulley uses a wheel and a rope to lift or lower an object.

INCLINED PLANEINCLINED PLANE

• An inclined plane moves objects up or down.

SCREWSCREW

• A screw holds things together or lift objects

WHEEL AND AXLEWHEEL AND AXLE

• A wheel turns around an axle .We use it to move or lift an object

WEDGEWEDGE

• We use a wedge to cut objects.

LEVERLEVER

• A lever is a rigid bar with a fulcrum we use to lift or move objects