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lunes, 9 de febrero de 2015
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lunes, 2 de febrero de 2015
(unit_2)Simple machines: types of levers
LEVERS
There are three types of levers: class 1, class 2 and class 3.
There are three main parts: point of support or fulcrum, resistance or load and force or effort
Class 1 lever:
The fulcrum is in the middle. It is between the force and the resistance.
Examples: Scissors and pliers
Class 2 lever:
The load or resistance is in the middle.
Examples: wheel barrels and nutcrackers
Class 3 lever:
The force or effort is in the middle.
Examples: stapler and tweezers
There are three types of levers: class 1, class 2 and class 3.
There are three main parts: point of support or fulcrum, resistance or load and force or effort
Class 1 lever:
The fulcrum is in the middle. It is between the force and the resistance.
Examples: Scissors and pliers
Class 2 lever:
The load or resistance is in the middle.
Examples: wheel barrels and nutcrackers
 |
| WHEELBARROW |
 |
| NUTCRACKER |
Class 3 lever:
The force or effort is in the middle.
Examples: stapler and tweezers
 |
| TWEEZERS |
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