Simple machine

A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Usually the term refers to the six classical simple machines which were defined by Renaissance scientists:

A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load. The ratio of the output to the applied force is called the mechanical advantage.

Simple machines can be regarded as the elementary "building blocks" of which all more complicated machines (sometimes called "compound machines") are composed. For example, wheels, levers, and pulleys are all used in the mechanism of a bicycle. The mechanical advantage of a compound machine is just the product of the mechanical advantages of the simple machines of which it is composed.

Rube Goldberg

Reuben Garrett Lucius "Rube" Goldberg (July 4, 1883 – December 7, 1970) was an American cartoonist, sculptor, author, engineer, and inventor.

He is best known for a series of popular cartoons depicting complicated gadgets that perform simple tasks in indirect, convoluted ways, similar to Heath Robinson devices in the UK, as well as the Storm P devices in Denmark. Goldberg received many honors in his lifetime, including a Pulitzer Prize for his political cartooning in 1948 and the Banshees' Silver Lady Award in 1959.

Goldberg was a founding member and the first president of the National Cartoonists Society, and he is the namesake of the Reuben Award, which the organization awards to the Cartoonist of the Year. He is the inspiration for various international competitions, known as Rube Goldberg Machine Contests, which challenge participants to make a complicated machine to perform a simple task.

Personal life

Reuben Lucius Goldberg was born July 4, 1883, in San Francisco, California, to Jewish parents Max and Hannah (Cohen) Goldberg. He was the third of seven children, three of whom died as children (older brother Garrett, younger brother Walter, and younger sister Lillian also survived).