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Simple Machines

QuestionAnswer
Work Something done whenever a force moves an object through a distance.
Simple machine One of six basic kinds of tools with few or no moving parts that make work easier
Lever A simple machine made of a bar or board that is supported underneath at the fulcrum; a bar that tilts about a pivot to move a load
Fulcrum The point on which a lever is supported and moves; the pivot on which a device such as a lever is supported so that it can balance, tilt or swing
Inclined plane A simple machine that is a flat surface with one end higher than the other; it enables a smaller force to lift a load over a longer distance
Screw A simple machine used to hold objects together. It is an inclined plane wrapped around a rod
Pulley A simple machine made of a wheel and a rope; a wheel with a grooved rim through which a rope, chain or belt is pulled to lift a load
Wheel and axle A simple machine that has a center rod attached to a wheel; a class of rotating machines in which effort applied to the wheel produces a useful movement in the axle or vice versa
Wedge A simple machine used to cut or split an object; a machine with a sloping side that moves to exert force
Force A push or pull that makes something move, slows it down or stops it, or the pressure that something exerts on an object.
Mechanical advantage the time and energy gained by using a machine to do work
Gravity Gravity the force that gives everything weight and pulls objects toward the Earth's center
Gear wheel with notches, or cogs, cut around its edge; used to transmit the turning movement of one wheel to a second wheel
Friction force of rubbing between two surfaces that slows movement and also produces heat or sound
Wheel a circular rotating part in a machine that moves around an axle
Energy the capacity to do work
Compound machine machine a machine that contains more than one simple machine
Axel the shaft on which a wheel turns
Created by: dr_allison