They don't have moving parts.
it has no moving parts
Lever
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.
The others are a bit more tricky.
it has no moving parts
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?
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There isn't always a benefit to simple machines sometimes they are easier other times they need to perform hard tasks and the simple machines cant do it
Caste iron
Lever and a weel
Technically, no animal is a simple machine. Simple machines are the basic elements which comprise all other machines. Though some people compare animals to machines and comparisons between anatomy and simple machines might be possible, they are far from obvious.
Lever
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.