Simple and Compound Machines

Vocabulary flashcards covering the definitions, types, and real-life examples of simple and compound machines based on the lecture notes.

Simple Machine

A device that makes work easier by changing the size or direction of a force.

Lever

A rigid bar that rotates around a fixed point called a fulcrum.

Fulcrum

The fixed point around which a lever rotates.

First Class Lever

A lever where the fulcrum is between the effort and the load, such as a seesaw, scissors, or crowbar.

Second Class Lever

A lever where the load is between the fulcrum and the effort, such as a wheelbarrow, nutcracker, or bottle opener.

Third Class Lever

A lever where the effort is between the fulcrum and the load, such as tweezers, a fishing rod, or tongs.

Wheel and Axle

A simple machine consisting of a wheel attached to a smaller rod called an axle, which reduces friction and makes movement easier.

Pulley

A wheel with a rope used to lift or lower objects by changing the direction of force.

Fixed Pulley

A type of pulley system where the wheel is attached to a stationary structure.

Moveable Pulley

A type of pulley system where the wheel moves with the load.

Block and Tackle

A compound pulley system used to lift heavy loads.

Inclined Plane

A slanted surface used to move objects to different heights, requiring less force to lift objects.

Wedge

A simple machine made of two inclined planes joined together used to cut or split materials.

Screw

An inclined plane wrapped around a cylinder, used to hold objects together, drill holes, or pump liquids.

Compound Machine

A machine made up of two or more simple machines working together to perform complex tasks efficiently.

Bicycle

A compound machine containing a wheel and axle (wheels), levers (brakes and pedals), and gears.

Scissors

A compound machine composed of a lever and a wedge (blades) that makes cutting easier.

Wheelbarrow

A compound machine composed of a lever and a wheel and axle used to transport heavy loads easily.