A shovel, which is a tool made up of a wedge and a lever; a wheelbarrow, which is a tool made up of levers, including planes, screws, and wheels and axels; and a bicycle, which is a vehicle made up of wheels and axels, pulleys, screws, levers, and included planes, are three common examples of compound machines.
Every day, we come across a variety of compound machineries. These are machines that are constructed from one or more of the six simple machines. A wheelbarrow, for example, is a compound machine. A wheelbarrow, of course, has a wheel and an axle. A pair of scissors is another simple compound machine tool. Scissors have two cutting edges that move relative to each other.
In fact, almost all tools that are used in the daily life are compounds. For example, a hammer is a simple machine tool while a sledgehammer is a complex machine tool. The difference is that sledgehammers have multiple heads connected by a single handle.
Also, a kitchen knife is a simple tool while a cleaver is a complex tool. The reason why these tools are called "simple" or "complex" is because they can be classified into those categories based on their structures. There are many other examples of simple tools vs complex tools out there. Have you ever heard of a drill press? It's a complex tool used for drilling holes in materials like wood and metal. This tool consists of a base plate, a shaft, a head attached to the end of the shaft, and a foot pedal system used to control the speed at which the tool spins.
Now, let's see how these terms are defined in textbooks. A textbook will usually define a tool as simple or complex based on its structure.
Compound machines are simply machines composed of two or more basic machines. A wedge, an inclined plane (like a ramp), a screw, a pulley, a wheel and axle, and a lever are examples of simple machines. A jack is a machine that uses these three devices simultaneously to lift heavy objects. The term "compound" comes from the fact that many of these devices are used together to create something more complex than any of them alone.
Jack-up rigs are common in construction work where it is necessary to lift very heavy objects that might be difficult or dangerous to move otherwise. They are also used by factories and warehouses when it is necessary to lift large objects that are not easy to move otherwise. Jack-up rigs consist of a base platform that lifts itself off the ground using jacks. The object being lifted is placed on the platform and the jacks raise it into the air.
There are several different types of jacks available for use on jack-up rigs. Some jacks are designed to lift only a few hundred pounds, while others can lift up to 10,000 pounds or more. The type of jack used depends on what kind of load is being lifted. For example, if the object being lifted is relatively small and can be handled easily then a hydraulic jack could be used instead of a pneumatic one.
A compound machine is made up of at least two basic machines. Compound machinery include bicycles, automobiles, scissors, and fishing rods with reels. Compound machines are less efficient but have a bigger mechanical advantage than simple machines. For example, a bicycle with a big wheel and a small handlebar can be more efficient at producing force than an ordinary bicycle because it has a greater mechanical advantage. The same is true for cars and other vehicles: they are composed of many parts that work together to produce power. A toy car is a simple machine; it is not considered a compound machine.