TECHNICAL KNOWLEDGE – 2b. Mechanical Systems (Levers)
A lever is a simple machine that will make lifting or moving an object much easier.
What are levers used for?
A lever is a simple machine that helps move or affect an object, when used properly it changes the amount of force that is applied.
What are the parts of a lever?
All levers are made up of the same parts or features though they are combined in different formations. The lever is made up of a rigid rod and a pivot point sometimes called a fulcrum, it can be either at one end or somewhere along its length. Two further points to think about are effort and the load in this simple machine. Have a look at the images to help understand this science come to life.
How many types of levers are there?
Easy there are three which are split into classes, class 1, class 2 & guess what, yes class 3.
Class 1 covers things like scissors, crowbars and seesaws, Class 2 Wheel barrows, doors and nut crackers while Class 3 covers tweezers, brooms and nail clippers.
Check out the images and presentation and all will become clear.
|Class 1 Lever||Class 2 Lever||Class 3 Lever|
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