Offered with manually operable features, the proposed water-draining pump would be more or less a compound machine
, comprising a well-arranged system of pulleys attached to a garden hose.
Scooters are attached by a rope to the pulley wheel built into the gears, making a compound machine
. This permits the students to use the gears in several different ways.
The key: Connect simple machines, such as levers and screws, to build a compound machine
. Simple machines use physical laws to make work easier--for instance, allowing you to move a much heavier weight than you could alone.
3) or, alternatively, take apart a compound machine
and show how the simple machines inside make it work.
They combined simple machines to form compound machines
. For example, a hoe is a lever and a wedge combined into one tool.
Rube Goldberg machine makers link simple devices into elaborate compound machines
. "It's amazing what these kids come up with," says Kathleen Felix of Rube Goldberg Inc., which runs the contests.
The company recently inaugurated a new plant in Taoyuan County, northern Taiwan which focuses on the production of large-sized vertical CNC lathes, horizontal CNC lathes, PCB drilling machines and lathe/mill compound machines
for the industries of large-sized oil pipes, windpower generators, aerospace and railway transport.
Most machines are compound machines
. This means they are made of two or more simple machines working together.
Bicycles, explains Gold, are compound machines
, made up of many simple machines, such as levers and wheels and axles.