Thames & Kosmos Simple Machines handleiding

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Thames & Kosmos

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Handleiding

Levers Section Objective: Experiment to

see how levers make lifting a load easier.

Three types of levers

YOU WILL NEED

Class  Lever

HERE’S HOW

Follow steps 1 through 8 to

build a class 1 lever.



Levers

EXPERIMENTS 1

–

LEVERS

Levers are rigid bars that pivot on a point called

the fulcrum. A weight (or load) at one point on

the bar can be moved by applying a force (the

effort) to another point on the bar. If the distance

from the fulcrum to the effort (the effort arm)

is greater than the distance from the fulcrum

to the load (the load arm), then a smaller force

can move a larger load. This is how the lever

makes work easier. There are three types

of levers: Class 1, 2, and 3. The class

depends on where the load

and force are

positioned

relative to the

fulcrum.

x8 x6

x1 x1

x1x1

x2 x1

x2 x2 x2

x1 x2

1 2 4 8 9

16 17 19 20 25 36

38 39 40

Effort

Force

Fulcrum

Load

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