The lever has the greatest number of different simple machines. It can be classified into three types: first-class, second-class, and third-class levers, based on the relative positions of the load, effort, and fulcrum. Each type can be further adapted for various applications, leading to a wide range of lever designs used in tools and machinery.
Probably the pulley amongst the simple machines is having the greatest impact on mankind.
Some common questions about simple machines include: How do simple machines make work easier? What are the different types of simple machines? How do simple machines affect force and distance in work? How can simple machines be combined to create complex machines?
They don't have moving parts.
................
The others are a bit more tricky.
it has no moving parts
A CATAPULT IS A LEVER!!!
There are many different types of machines in the world. Machines help people do work, and make it easier for them. There are six simple machines, and the rest are classified as complex. These six simple machines are: 1) Pulley 2) Screw 3) Lever 4) Inclined Plane 5) Wheel and axle 6)Wedge
6 simple machines.
Simple Machines was created in 1990.
Simple Machines ended in 1998.
The similarities are that simple and complex machines are both made up of simple machines