Thames & Kosmos Simple Machines handleiding

Niet gecategoriseerd

Thames & Kosmos

36 pagina's

PDF beschikbaar

Handleiding

Levers, levers, and

more levers

WHAT’S HAPPENING

A lever amplifies an input force (the effort) to

provide a greater output force at the load. The

ratio of the output to input force is the

mechanical advantage (MA) of the lever. This is

also equal to the length of the Effort Lever Arm

divided by the length of the Load Arm.

Effort Force • Effort Arm = Load Force • Load Arm

MA = Load Force / Effort Force

MA = Effort Arm / Load Arm

In the lever experiments, you can see how as

the distance between the point of application

of the effort force and the fulcrum decreases,

the load feels heavier — the mechanical

advantage decreases.

HERE’S HOW

Try building each of these four simple

machines. They are all levers. Can you

figure out what class of lever each one is?

Answers below.

1. Class 1; 2. Class 3; 3. Class 2; 4. Multiple class 1 levers

Eﬀort

Force

Load

Force

Eﬀort Arm Load Arm

Fulcrum

Eﬀort

Force

Load

Force

Eﬀort Arm

Load Arm

Fulcrum

Eﬀort

Force

Load

Force

Load Arm

Eﬀort Arm

Fulcrum

CLASS 1 LEVER

CLASS 2 LEVER

CLASS 3 LEVER

EXPERIMENTS 4

–

Bekijk gratis de handleiding van Thames & Kosmos Simple Machines, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.