Radience

Work and Machines

Science

compound machine

a machine made of two or more simple machines
compound machine Simple Definition

efficiency

the percentage of energy input that a machine converts to work output
efficiency Simple Definition

fulcrum

fixed point on which a lever pivots
fulcrum Simple Definition

inclined plane

a simple machine with a flat, sloped surface
inclined plane Simple Definition

input force

the force applied to a machine
input force Simple Definition

joule

the SI unit of energy, also known as the Newton-meter
joule Simple Definition

lever

a simple machine that consists of a bar that pivots on a fixed point
lever Simple Definition

machine

a device that makes work easier by changing the size or direction (or both) of a force
machine Simple Definition

mechanical advantage

the ratio of the output force to the input force in a machine
mechanical advantage Simple Definition

output force

the force exerted by a machine
output force Simple Definition

power

the rate at which work is done, it is measured in watts (W)
power Simple Definition

pulley

a simple machine made of a wheel with a rope around it
pulley Simple Definition

screw

a simple machine made of an inclined plane wrapped around a cylinder
screw Simple Definition

wedge

a simple machine made of one or two inclined planes
wedge Simple Definition

wheel and axle

a simple machine made of a wheel with a rod joined at its center, they rotate together
wheel and axle Simple Definition

work

the use of force to move an object over a distance, its unit is the Joule (J)
work Simple Definition

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