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You probably mean the two CLASSES of simple machines.
There are six simple machines:
Inclined Plane
Wedge
Screw
Pulley
Wheel
Lever
The two classes of simple machines are:
1. The simple machines that deal with vector quantities like velocity and force
(the inclined plane, the wedge and the screw).
2. The simple machines that deal with torque (the force to rotate an object around an axis, pivot, etc.) like the pulley, the wheel, the lever.
You would think a screw falls into the torque class, but it's classified as a helical inclined plane.
Read more: http://wiki.answers.com/What_are_the_two_classification_of_simple_machines#ixzz1mZkiS0qr
What else can I help you with?
What two simple machines are most alike?
What are three simple machines that are basically the same?
What simple machines are in a scissor style jack?
The scissor style jack contains only two simple machines: the screw and the lever.
What is a combination of two or more simple machines?
A complex machine.
When two or more simple machines work together they are called?
When simple machines work together, that forms a compound machine.
Is a seesaw a compound machine?
A see-saw is a type of lever. Levers are simple machines. When you put two or more simple machines together, you get a compound machine. == ==
When a hammer pulls a nail out of the object what are the two simple machines at work?
The two simple machines are a lever and a fulcrum.
What two simple machines are most alike?
What are three simple machines that are basically the same?
What are the two types of mechanical device?
The two types of mechanical devices are simple machines and complex machines. Simple machines include tools like levers, pulleys, and screws, while complex machines are made up of multiple simple machines working together, such as engines or robots.
Are wheelbarrows simple machines?
No. It's a compound machine made of two simple machines: lever and wheel & axle.
What are two simple machines?
compoud machine
Two reasons why people use simple machines?
The two reasons why people use simple machines are because they make things easier to pull and lift.
Do all machines need to have a simple machine in them?
No, not all machines require the use of simple machines. Some machines rely on more complex mechanisms or technologies to function efficiently. Simple machines are often used to make work easier by multiplying or redirecting force, but they are not a requirement for all machines.
How do you manipulate simple machines and make their parts work together?
simple machines are put together by connecting. for example, in cars. simple machines work together by putting their strength
Machines that are made up of two or more simple machines are called?
compound machine
What do you call a simple machine made of two simple machines?
coumpound machine
What are two other simple machines?
Lever and a weel
What is a combinatoin of two simple machines?
A compound machine.
