Simple and Compound Machines

This set of vocabulary flashcards covers the definitions, functions, and differences between simple and compound machines based on the lecture notes.

Compound (or complex) machine

Two or more simple machines working together as one system.

Machine

Any device that makes work easier by changing the size, direction, or point of application of a force.

Transfers force

A function of a machine that carries your effort to where the load is.

Multiplies force

A function of a machine where a small effort moves a large load.

Increases speed / distance

A function of a machine that trades force for a faster, longer motion.

Simple machines

One machine consisting of a single force-changing element that alters force size or direction once.

Simple Machine Mechanical Advantage

Mechanical advantage set by a single geometry ($MA$).

Compound Machine Mechanical Advantage

Multiplied advantage where $MA$s combine for greater output.

Chained changes

A feature of compound machines where each stage passes force to the next.

Simple machine examples

lever, pulley, ramp, wedge, screw.

Compound machine examples

bicycle, crane, scissors, car engine.